Question

7. A bag contains 6 white, 4 red and 5 black balls. What is the probability of drawing a black ball
when one ball is taken out at random?
8. A spinner having numbers 1, 1, 1, 2, 2, 3 is spun. What is the probability that pointer stops at 2?
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Answer 1

Answer:

7. 1/3

8. 1/3

Step-by-step explanation:

7. let white balls be (w)

red balls be (r)

black balls be (b)

p(b) = n(b)/n(s)

n(w) = 6

n(r) = 4

n(b) = 5

n(s) = 6+4+5

= 15

p(b) = 5/15

= 1/3

8. n(2) = 2

n(s) = 6

p(2) = n(2)/n(s)

p(2) = 2/6

= 1/3