Probability (Advanced)

JKSSB Finance Accounts Assistant · Mathematics · 15 practice questions with answers and explanations: 2 Easy, 6 Medium, 7 Hard.

Sample questions

Sample Easy question 1

If the odds in favour of an event are 3 : 5, the probability of the event is:

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

Answer: C. Odds a : b in favour give P = a/(a + b) = 3/8.

Sample Medium question 2

A leap year is chosen at random. The probability that it has 53 Sundays is:

  1. 1/7
  2. 53/366
  3. 1/2
  4. 2/7
Show answer

Answer: D. 366 days = 52 weeks + 2 days. The 2 extra days form one of 7 equally likely pairs, 2 of which include a Sunday: 2/7.

Sample Hard question 3

Two dice are rolled. Find the probability that the sum is 7.

  1. 1/12
  2. 1/6
  3. 1/9
  4. 1/4
Show answer

Answer: B. There are 6 favorable outcomes out of 36 total, giving 6/36 = 1/6.

More Mathematics topics for JKSSB Finance Accounts Assistant

Related articles