Question

A bag contains 3white, 5black and 2red balls all of the same shape and size a ball is draw from the bag :find the probability that the ball draw is 1.)a black ball 2.)a red ball 3.)not a red ball​

Answer 1

Step-by-step explanation:

In a bag 3 balls are white

2 balls are red

5 balls are black

Total number of balls = 3 + 2 + 5 = 10

(i) Number of possible outcome of one black ball = 10

And number of favourable outcome of one black ball = 5

∴ P(E) = Number of favourable outcome/Number of all possible outcome

= 5/10 = 1/2

(ii) Number of possible outcome of one red ball = 10

And number of favourable outcome = 2

∴ P(E) = Number of favourable outcome/Number of all possible outcome

= 2/10 = 1/5

iii .Number of possible outcome = 10

Number of favourable outcome

= 3 + 5 = 8

Not a red ball

∴ P(E) = Number of favourable outcome /Number of all possible outcome

= 8/10 = 4/5

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