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For every x celestial objects of the Sunny Way galaxy that can be seen from the Earth, there are x – (x) celestial objects of the galaxy that cannot be seen from the Earth. In the years of research done on the Sunny Way galaxy, scientists have been able to see only 93 planets in the galaxy. These planets were seen to have an average of 7 satellites per planet. It is also known that the ratio of the number of stars in the galaxy that are seen from the Earth to the number of satellites in the galaxy that are seen from the Earth is 2600:1 Assuming the same ratios are followed for the invisible celestial objects, which of the following is closest to the number of celestial objects in the Sunny Way galaxy?
  • a)
    3 * 1012
  • b)
    2 * 1016
  • c)
    5 * 1018
  • d)
    5 * 10
    21
  • e)
    7 * 1023
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
For every x celestial objects of the Sunny Way galaxy that can be seen...
Given:
  • For every x seen celestial objects, there are x3 – x unseen celestial objects
    • Number of total objects = x + x3 – x = x3
    • So, if the number of seen celestial objects is x, the number of total objects is x3
  • 93 planets have been seen
    • Average number of satellites per planet = 7
To Find: Number of objects in the galaxy?
Approach:
  1. Number of objects in the galaxy = number of stars + number of planets + number of satellites
  2. Number of Planets
    • As we know the number of planets seen from the earth, we can calculate the number of planets in the galaxy
  3. Number of Satellites
    • We are given the number of satellites per planet in the galaxy. As we know the number of planets seen, we can calculate the number of satellites seen.
    • Once we calculate the number of satellites seen from the earth, we can calculate the number of satellites in the galaxy
  4. Number of Stars
    • ​​We are given the ratio of number of stars seen from the earth and the number of satellites seen from the earth. We can use this information to calculate the number of stars seen from the earth
    • Once we know the number of stars seen from the earth, we can calculate the total stars in the galaxy.
Working out
Answer C
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For every x celestial objects of the Sunny Way galaxy that can be seen from the Earth, there are x – (x) celestial objects of the galaxy that cannot be seen from the Earth. In the years of research done on the Sunny Way galaxy, scientists have been able to see only 93 planets in the galaxy. These planets were seen to have an average of 7 satellites per planet. It is also known that the ratio of the number of stars in the galaxy that are seen from the Earth to the number of satellites in the galaxy that are seen from the Earth is 2600:1 Assuming the same ratios are followed for the invisible celestial objects, which of the following is closest to the number of celestial objects in the Sunny Way galaxy?a)3 * 1012b)2 * 1016c)5 * 1018d)5 * 1021e)7 * 1023Correct answer is option 'C'. Can you explain this answer?
Question Description
For every x celestial objects of the Sunny Way galaxy that can be seen from the Earth, there are x – (x) celestial objects of the galaxy that cannot be seen from the Earth. In the years of research done on the Sunny Way galaxy, scientists have been able to see only 93 planets in the galaxy. These planets were seen to have an average of 7 satellites per planet. It is also known that the ratio of the number of stars in the galaxy that are seen from the Earth to the number of satellites in the galaxy that are seen from the Earth is 2600:1 Assuming the same ratios are followed for the invisible celestial objects, which of the following is closest to the number of celestial objects in the Sunny Way galaxy?a)3 * 1012b)2 * 1016c)5 * 1018d)5 * 1021e)7 * 1023Correct answer is option 'C'. Can you explain this answer? for GMAT 2024 is part of GMAT preparation. The Question and answers have been prepared according to the GMAT exam syllabus. Information about For every x celestial objects of the Sunny Way galaxy that can be seen from the Earth, there are x – (x) celestial objects of the galaxy that cannot be seen from the Earth. In the years of research done on the Sunny Way galaxy, scientists have been able to see only 93 planets in the galaxy. These planets were seen to have an average of 7 satellites per planet. It is also known that the ratio of the number of stars in the galaxy that are seen from the Earth to the number of satellites in the galaxy that are seen from the Earth is 2600:1 Assuming the same ratios are followed for the invisible celestial objects, which of the following is closest to the number of celestial objects in the Sunny Way galaxy?a)3 * 1012b)2 * 1016c)5 * 1018d)5 * 1021e)7 * 1023Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for GMAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For every x celestial objects of the Sunny Way galaxy that can be seen from the Earth, there are x – (x) celestial objects of the galaxy that cannot be seen from the Earth. In the years of research done on the Sunny Way galaxy, scientists have been able to see only 93 planets in the galaxy. These planets were seen to have an average of 7 satellites per planet. It is also known that the ratio of the number of stars in the galaxy that are seen from the Earth to the number of satellites in the galaxy that are seen from the Earth is 2600:1 Assuming the same ratios are followed for the invisible celestial objects, which of the following is closest to the number of celestial objects in the Sunny Way galaxy?a)3 * 1012b)2 * 1016c)5 * 1018d)5 * 1021e)7 * 1023Correct answer is option 'C'. Can you explain this answer?.
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