    Question

# There are 5 green, 6 black and 7 white balls in a bag. A ball is drawn at random from the bag. Find the probability that it is not white.

A

1118

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B

718

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C

23

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D

518

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Solution

## The correct option is A 1118 Given, Number of green balls = 5 Number of black balls = 6 Number of white balls = 7 Total number of outcomes = 5 + 6 + 7 = 18 There are 18 balls out of which 11 are not white. ⇒ Number of favourable outcomes = 11 Probability of an event, P(E)=Number of favourable outcomesTotal number of outcomes ⇒ P( ball drawn is not white) = 1118 ∴ Probability that the ball drawn is not white is 1118 . Alternate Method: P (ball drawn is white) = 718 By complementary event formula, P( ball drawn is white) + P( ball drawn is not white) = 1 ⇒ P( ball drawn is not white) =1−P( ball drawn is white) =1−718=1118 ∴ Probability that the ball drawn is not white is 1118.  Suggest Corrections  0      Similar questions
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