Question

There are 5 black, 10 white nd five yellow balls in a box. what is probability of getting yellow balls​

Answer 1

Answer:

Total balls = 20

Yellow Balls = 5

P(Yellow Ball) = 5/20 = 1/4

Answer 2

let, five black ball be B¹,B²,B³,B⁴,B⁵.

Ten white ball is W¹,W²,W³,W⁴,W⁵,W⁶,W⁷,W⁸,

W⁹,W¹⁰.

five yellow ball is Y¹,Y²,Y³,Y⁴,Y⁵.

Sample space,

S={B¹,B²,B³,B⁴,B⁵,W¹,W²,W³,W⁴,W⁵,W⁶,W⁷,W⁸,W⁹,W¹⁰,Y¹,Y²,Y³,Y⁴,Y⁵}

n(S)=20

let,A be the event getting yellow balls.

A={Y¹,Y²,Y³,Y⁴,Y⁵}

n(A)=5

Now,

p(A)=n(A)

n(S)

=5

20

=1

4

therefore the probability getting yellow balls is 1/4