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## GMAT Practice Question Set # 7 (Question 22-27)

GMAT Integrated Reasoning  >  Question # 23: Random Boy
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Height-for-age Weight-for-height
 The World Health Organization (WHO) has produced a comprehensive set of growth standards for children. These standards are based on studies of children living in 6 nations on 5 continents under optimal conditions with respect to health and nutrition. The table displays the percentil distribution of height, in centimeters, at 3-month intervals, for boys ages 2 through 5 according to the WHO model. In a model population -- a large population of boys ages 2 through 5 that conforms to the WHO growth standards -- for n = 3, 15, 50, 85, and 97, nth percentile in height for a given age is the unique height among boys of that age that is greater than or equal to n percent, and less than or equal to (100- n) percent, of heights of boys of that age.

For each of the following statements, select Yes if the statement must be true of a boy selected at random from a model population. Otherwise, select No.

 Yes No If his age is greater than 3 years 3 months, the probability that his height is at least 98.0 cm is greater than 50%. If he is at least 105 cm tall, the probability that his weight is 14.0 kg is no greater than 3% If he is 114 cm tall, he is taller than at least 85% of boys his age.