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snow_tiger [21]

3 years ago

6

A class of 144 students voted for a class president 3/4 of the students vited for you. Of the students who voted for you 5/9 are

female. How many female students vited for you?
A. 50
B. 60
C. 80
D. 108

2 answers:

antoniya [11.8K]3 years ago

8 0

3/4 x 144 = 108
108 x 5/9 = 60

B. 60 female students voted for you.

Lady_Fox [76]3 years ago

8 0

I believe the answer is B, 60.
Because 3/4 of 144 is 108, and 5/9 of 108 is 60.
Hope this helps :)

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X 0 1 2 3 4 5

P 1,5 0,84 1,26 1,26 0,84 3,5

b,

E(x)= 1,5*0+ 0,84*1+1,26*2+1,26*3+0,84*4+3,5*5=28

E(x^2)=1,5*0^2+0,84*1^2+1,26*2^2+1,26*3^2+0,84*4^2+3,5*5^2=118,16

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