Of the 800 people surveyed in a recent American Idol study, 78% of them said that the females are better than the males. How many people surveyed said that females are better than males?

624

Step-by-step explanation:

No. of people surveyed = 800

percentage of people  said that the females are better than the males = 78

percentage is the quantitative way to express number of things out of 100 things.

For example : 50% of apples are ripe.

it means that if there are 100 apples, 50 are ripe.

Suppose if there 1000 apples then we can say that

50% of 1000 apples are ripe.

which can be evaluated by (50/100)*1000 = 500

based on the above discussion we can say that

No of people who said that females are better than males=

78% of No. of people surveyed

=> 78% of 800

=> (78/100) * 800

=> 624

Therefore, 624 people said that females are better than males

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0