Find the value of ?.
The options are 61.5, 123, 246, 57

123°

Step-by-step explanation:

Since, measure of minor arc is equal to the measure of its corresponding central angle.

Measure of central angle = 123°

So,? = 123°

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

but which class are u may know that first