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In a group of 100 students, every student study 8 subjects and every subject is studied by 10 students. The number of subjects is:
  • a)
    Exactly 80
  • b)
    May be 50
  • c)
    At most 30
  • d)
    At least 90
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
In a group of 100 students, every student study 8 subjects and every s...
Total students = 100
According to the question
Every students study 8 subjects, then total subjects = 8 × 100 = 800
If every subject is studied by 10 students, then number of subjects = 800/10 = 80
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Most Upvoted Answer
In a group of 100 students, every student study 8 subjects and every s...
Total students = 100
According to the question
Every students study 8 subjects, then total subjects = 8 × 100 = 800
If every subject is studied by 10 students, then number of subjects = 800/10 = 80
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Directions:Read the passages and choose the best answer to each question.PassageA group of students conducted several experiments using a variety of nonstick cookware, a spring scale, and several different weighted objects. Their goal was to determine which brand of cookware products had the best nonstick surface by measuring the coefficient of static friction, which is a measure of how resistant a stationary object is to movement.Experiment 1A student connected the spring scale to a weighted object that was placed inside a piece of nonstick cookware as shown in Figure 1.The students planned to calculate the coefficient of static friction by determining the force required to disturb an object from rest. During the experiment, one student anchored the nonstick cookware be holding tightly to the handle while the other student attached a weighted, smooth steel object to the spring scale. The student pulled on the spring until the object began to move. A third student recorded the force in newtons, N, indicated on the spring scale at the moment the object began to move across the nonstick surface.This procedure was repeated for 3 different brands of cookware; each brand of cookware was tested with various weighted objects. The coefficient of static friction was calculated by dividing the average force required to move the object by its weight (mass × g, the gravitational constant).The results are shown in Table 1.Experiment 2The students performed an experiment similar to Experiment 1, except three different brands of cooking spray were applied to the same cookware surface before the weights were put in place. The results are shown in Table 2.Q.The students’ instructor gave them one piece of nonstick cookware and asked them to identify the brand. The students repeated the procedures followed in Experiment 1 and obtained average forces of 0.088 N for the 150 gram object and 0.149 N for the 250 gram object. Which of the following brands would most likely have produced these results?

Directions:Read the passages and choose the best answer to each question.PassageA group of students conducted several experiments using a variety of nonstick cookware, a spring scale, and several different weighted objects. Their goal was to determine which brand of cookware products had the best nonstick surface by measuring the coefficient of static friction, which is a measure of how resistant a stationary object is to movement.Experiment 1A student connected the spring scale to a weighted object that was placed inside a piece of nonstick cookware as shown in Figure 1.The students planned to calculate the coefficient of static friction by determining the force required to disturb an object from rest. During the experiment, one student anchored the nonstick cookware be holding tightly to the handle while the other student attached a weighted, smooth steel object to the spring scale. The student pulled on the spring until the object began to move. A third student recorded the force in newtons, N, indicated on the spring scale at the moment the object began to move across the nonstick surface.This procedure was repeated for 3 different brands of cookware; each brand of cookware was tested with various weighted objects. The coefficient of static friction was calculated by dividing the average force required to move the object by its weight (mass × g, the gravitational constant).The results are shown in Table 1.Experiment 2The students performed an experiment similar to Experiment 1, except three different brands of cooking spray were applied to the same cookware surface before the weights were put in place. The results are shown in Table 2.Q.Based on the results of Experiments 1 and 2, which of the following combinations would result in the surface with the least coefficient of static friction?

Directions:Read the passages and choose the best answer to each question.PassageA group of students conducted several experiments using a variety of nonstick cookware, a spring scale, and several different weighted objects. Their goal was to determine which brand of cookware products had the best nonstick surface by measuring the coefficient of static friction, which is a measure of how resistant a stationary object is to movement.Experiment 1A student connected the spring scale to a weighted object that was placed inside a piece of nonstick cookware as shown in Figure 1.The students planned to calculate the coefficient of static friction by determining the force required to disturb an object from rest. During the experiment, one student anchored the nonstick cookware be holding tightly to the handle while the other student attached a weighted, smooth steel object to the spring scale. The student pulled on the spring until the object began to move. A third student recorded the force in newtons, N, indicated on the spring scale at the moment the object began to move across the nonstick surface.This procedure was repeated for 3 different brands of cookware; each brand of cookware was tested with various weighted objects. The coefficient of static friction was calculated by dividing the average force required to move the object by its weight (mass × g, the gravitational constant).The results are shown in Table 1.Experiment 2The students performed an experiment similar to Experiment 1, except three different brands of cooking spray were applied to the same cookware surface before the weights were put in place. The results are shown in Table 2.Q.According to the passage, for the students to accurately measure the coefficient of static friction, which force would have to be overcome?

Directions:Read the passages and choose the best answer to each question.PassageA group of students conducted several experiments using a variety of nonstick cookware, a spring scale, and several different weighted objects. Their goal was to determine which brand of cookware products had the best nonstick surface by measuring the coefficient of static friction, which is a measure of how resistant a stationary object is to movement.Experiment 1A student connected the spring scale to a weighted object that was placed inside a piece of nonstick cookware as shown in Figure 1.The students planned to calculate the coefficient of static friction by determining the force required to disturb an object from rest. During the experiment, one student anchored the nonstick cookware be holding tightly to the handle while the other student attached a weighted, smooth steel object to the spring scale. The student pulled on the spring until the object began to move. A third student recorded the force in newtons, N, indicated on the spring scale at the moment the object began to move across the nonstick surface.This procedure was repeated for 3 different brands of cookware; each brand of cookware was tested with various weighted objects. The coefficient of static friction was calculated by dividing the average force required to move the object by its weight (mass × g, the gravitational constant).The results are shown in Table 1.Experiment 2The students performed an experiment similar to Experiment 1, except three different brands of cooking spray were applied to the same cookware surface before the weights were put in place. The results are shown in Table 2.Q.The results of the 2 experiments support the conclusion that as the weight of an object increases, the average force required to move it from rest generally

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In a group of 100 students, every student study 8 subjects and every subject is studied by 10 students. The number of subjects is:a)Exactly 80b)May be 50c)At most 30d)At least 90Correct answer is option 'A'. Can you explain this answer?
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