Question

There are 28 students in a class : all born in 1990.
A. The probability that all their birthdays are in February.
B. The probability that all their birthdays fall on a Friday.
In this question two quantities A and B are given. Compare the two quantities

• A. if quantity A is greater than quantity B
• B. if quantity B is greater than quantity A
• C. if quantities A and B are equal
• D. if comparison cannot be made

Answer 1

Answer: (B)

if quantity B is greater than quantity A

Answer 2

There are 28 students in a class : all born in 1990.
The probability that all their birthdays are in February. $=\frac{1}{2}$
The probability that all their birthdays fall on a Friday. $=\frac{1}{7}$
The chances that all will be born on a particular day of the week is thus higher than the chances of them all being born in the same month.So the correct option is (B)