Q1. A family has 2 children, then the probability of the event that atleast one of them is boy is:

a. 1/4 b. 1/2 c. 1/3 d. 3/4

Q2. A student is attempting to log on internet with 0.5 chance of successful attempt in each trail. The average no of attempts required to log on successfully is:

a. 1 b. 2 c. 3 d. 4