Answer:
- (-4)(9)
- (6)(-6)
Step-by-step explanation:
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2.

3.

4.

5.

Answer:
0.06597
Step-by-step explanation:
Given that thirty-seven percent of the American population has blood type O+
Five Americans are tested for blood group.
Assuming these five Americans are not related, we can say that each person is independent of the other to have O+ blood group.
Also probability of any one having this blood group = p = 0.37
So X no of Americans out of five who were having this blood group is binomial with p =0.37 and n =5
Required probability
=The probability that at least four of the next five Americans tested will have blood type O+
= 
|2x + y - 3z|
Plug in the values
|-4 + 10 - 9|
= |-3|
= 3