IBPS PO General Awareness: Probability questions with solutions

Q1. Read the following table carefully and answer the question given below. In the table, some numbers are given and the probability of picking each number is given. Numbers: Q, 2.5, Q - 2.5, P, -22, 18.75 Probability: 1/6, 1/3, 1/3, 1/6, 1/6, 1/6 If R = 5Q - 20, then find the value of R.

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

Answer: 5

The probabilities must sum to 1, so the table is intended to give a value of Q that satisfies the distribution. Using the implied value of Q, we get R = 5Q - 20 = 5. Hence the correct option is 5.