Question

a) maddy has 4 white balls and 7 black
bally in a bag. She draws a ball from
the bag
a) what is the probability of not getting white ball
b) what is the probability of getting
getting a white ball​

Answer 1

Answer:

white ball =w

black ball =b

S={w1,w2,w3,w4,b1,b2,b3,b4,b5,b6,b7}

n(S)=11

a) A={b1,b2,b3,b4,b5,b6,b7}

n(A)=7

P(A)=n(A)/n(S)=7/11

P(A)=7/11

2)B={w1,w2,w3,w4}

n(B)=4

P(B)=n(B)/n(S)=4/11

P(B)=4/11