Answer:






Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
In this problem we have that:

Distribution







Set up a proportion:
4.1/22 = 12.3/x
Cross multiply:
4.1 * x = 22 * 12.3
4.1x = 270.6
Divide 4.1 to both sides:
x = 66
Step-by-step explanation:
.......................................................... (2×3)+(6×3)
Answer:
a^2-12a+35
Step-by-step explanation:
(a-7)(a-5)
a^2-7a-5a+35
a^2-12a+35