Question

Dan is planting 24 iries in his front yard.The flowers he bought were a combination of two varieties ,blue and white .The flowers are not blooming yet ,but Dan knows that the probability of having a blue flower is 75%
1)what is probability that at least 20 of white irises in Dan's garden?
the key is 0.37

Answer 1

Probability at least 20 white irises
= P(X >= 20)
= P(X = 20) + P(X = 21) + P(X = 22) + P(X = 23) + P(X = 24)
= (24 C 20) (0.37)^20 (0.75)^4 + (24 C 21) (0.37)^21 (0.75)^3 + (24 C 22) (0.37)^22 (0.75)^2 +
(24 C 23) (0.37)^23 (0.75)^1 + (24 C 24) (0.37)^24 (0.75)^0
=

Answer 2

1-0.75=0.25
how you get 0.35 ?

Answer 3

im sorry maybe i messd up wit calculations,,, u check them