Class A has 29 pupils and class B has 22 pupils. Both classes sit the same maths test.
The mean score for class A is 57.
The mean score for both classes is 61.
What is the mean score (rounded to 2 DP) in the maths test for class B?

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

answer: i feel you honey.

step-by-step explanation:

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock

210/22 = 9.55

since he can't take part of a person to the game the answer is 9 people

hope this !