Probability

Quantitative Aptitude (CDS)

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Out of a total of 800 radio,20% are black and 10% are too green. The remainder is white. If a radio is selected at random, the probability that it will be white is?

4/10

5/10

7/10

2/5

Explanation:

Total number of radio =800

Number of black radio =20% of 800

=20×800/100

=160

Number of green radio =10% of 800

=10×800/100

=80

Number of white =800-240

=560

Thus the required probability=560/800

=7/10

By: bhavesh kumar singh

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