Question

A computer programmer has a 35 chance of finding a bug in any given program. what is the probability that she finds a bug within the first 3 programs she examines?

A) 0.15
B) 0.27
C) 0.59
D) 0.73

Answer 1

Answer is d

Explanation:

• A computer programmer has a 35 change of finding a bug in any given program.
• we have to find probability that she finds a bug within the first 3 programs she examines
• success = 0.35, failure = 0.65
• She get a bug in the first program itself
• p = 0.35
• She get a bug in 2nd program
• q = 0.65×0.35 =0.2275
• She get a bug in the 3rd program
• r = 0.65×0.65×0.35
• r = 0.147875
• Add all the three probabilities for answer
• P = p+q+r
• P = 0.35+0.2275+0.147875
• P = 0.725375
• P = 0.73
• The probability of the answer is 0.73