Symbiosis National Aptitude Test SNAP 2019 Paper

Question : 65 of 110

Marks: +1, -0

In a smart phone factory, Robot A, B and C manufacture 25%, 35% and 40% circuits board respectively. For each of the robot faulty circuit board is 5%, 4% and 2% respectively. What is the probability that the printed circuit board is defective if 1 circuit board is picked at random?

0.034
0.34
0.66
0.066

Validate

Solution:

Let total number of circuit board manufactured by Robot A, B and C = 100
∴ Number of circuit board manufactured by A = 25
Number of circuit board manufactured by B = 35
Number of circuit board manufactured by C = 40
Number of faulty circuit board manufactured by A = 25 ×

5/{100}

= 1.25
Number of faulty circuit board manufactured by B = 35 ×

4/{100}

= 1.40
Number of faulty circuit board manufactured by C = 40 ×

2/{100}

= 0.8
Total faulty circuit board
= 1.25 + 1.4 + 0.8 = 3.45
Probability for selecting a faulty circuit board
=

{3.45}/{100}

= 0.0345

Go to Question:

Prev Question

Next Question