Answer:
0.6804
Step-by-step explanation:
Given that Margie is practicing for an upcoming tennis tournament. Her first serve is good 20 out of 30 times on average.
Since each trial is independent and there are two outcomes, X no of good serves is binomial with n=6 and p =2/3
Required probability
= Prob that atleast four of 6 times good serve
=
=
Formula used:
P(X=r) =
(4x2) + (3x1)=11
I think that's right, can you have a plus sign
Answer:
4.5+2.4=6.9
Step-by-step explanation:
Fraction form: 69/10
You should get photo math you can take a picture and it will give you the answer and show you how to solve it