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  5. GMAT SECTION 2: QUANTITATIVE

Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 97)

Page 97 of 182
PDF with 745 Questions

The probability of having a girl is identical to the probability of having a boy. In a family with three children, what is the probability that all the children are of the same gender?

  1. 1/8.
  2. 1/6.
  3. 1/3.
  4. 1/5.
  5. 1/4.

Answer(s): E

Explanation:

The gender of the first-born is insignificant since we want all children to be of the same gender no matter if they are all boys or girls.
The probability for the second child to be of the same gender as the first is: ½. The same probability goes for the third child. Therefore, the answer is ½ x ½ = ¼.



On one side of a coin there is the number 0 and on the other side the number 1. What is the probability that the sum of three coin tosses will be 2?

  1. 1/8.
  2. 1/2.
  3. 1/5.
  4. 3/8.
  5. 1/3.

Answer(s): D

Explanation:

The coin is tossed three times therefore there are 8 possible outcomes (2 x 2 x 2). We are interested only in the three following outcomes:
(0,1,1), (1,0,1), (1,1,0).
The probability requested is 3/8.



The average length of 6 snakes is 80 cm. If the average length of one third of the snakes is 70 cm, what is the average of the other snakes?

  1. 75.
  2. 85.
  3. 90.
  4. 100.
  5. 94.

Answer(s): B

Explanation:

The length of all six snakes is 6 x 80 = 480 cm.
Third of the snakes are by average 70 cm long therefore their sum is 140. The sum of the length for the remainder of the snakes is 480 – 140 = 340. 340 / 4 snakes is 85 cm.



There are ten players in the basketball team. If the average height of the players is 170 cm, what will be the new average height if a 192 cm player will join the team?

  1. 181.
  2. 172.2.
  3. 172.
  4. 168.
  5. 184.

Answer(s): C

Explanation:

The new player is (192 – 170 = 22 cm) above average. Dividing the extra height among 11 players is 2 cm per player, thus the new average height is (170 + 2 = 172 cm).



Page 97 of 182



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