Twenty balls are serially numbered and placed in a bag. The probabilit...
Solution:
Given,
Total number of balls= 20
We need to find the probability of drawing a ball which is a multiple of 3 or 5.
Multiples of 3: 3, 6, 9, 12, 15, 18
Multiples of 5: 5, 10, 15, 20
Therefore, there are a total of 9 balls which are multiples of 3 or 5.
Probability= (Number of favourable outcomes)/(Total number of outcomes)
Total number of outcomes= 20 (since there are 20 balls in the bag)
Thus, the probability of drawing a ball which is a multiple of 3 or 5 is:
= 9/20
So, option (D) is the correct answer.
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Solution:
Given,
Total number of balls= 20
We need to find the probability of drawing a ball which is a multiple of 3 or 5.
Multiples of 3: 3, 6, 9, 12, 15, 18
Multiples of 5: 5, 10, 15, 20
Therefore, there are a total of 9 balls which are multiples of 3 or 5.
Probability= (Number of favourable outcomes)/(Total number of outcomes)
Total number of outcomes= 20 (since there are 20 balls in the bag)
Thus, the probability of drawing a ball which is a multiple of 3 or 5 is:
= 9/20
So, option (D) is the correct answer.