Answer:
x=125
Step-by-step explanation:
(a) If
are mutually exclusive, then

so we have

(b) If
are mutually independent, then




so that



Well, you want to find the value of x.
9514 1404 393
Answer:
Negative, because the product (-7)(-2) is positive, and the product (-5)(1) is negative and the product of a positive and a negative number is negative
Step-by-step explanation:
Negative, because there is an odd number of negative factors. The above explanation is reasonable, too.