Answer: 0.0241
Step-by-step explanation:
This is solved using the probability distribution formula for random variables where the combination formula for selection is used to determine the probability of these random variables occurring. This formula is denoted by:
P(X=r) = nCr × p^r × q^n-r
Where:
n = number of sampled variable which in this case = 21
r = variable outcome being determined which in this case = 5
p = probability of success of the variable which in this case = 0.31
q= 1- p = 1 - 0.31 = 0.69
P(X=5) = 21C5 × 0.31^5 × 0.69^16
P(X=5) = 0.0241
Answer:
11x(3y+66)+2y=59.
Step-by-step explanation:
33x(y+22)-2(y+22)=15
33xy+726x-2y-44=15
33xy+726x-2y=15+44
33xy+726x-2y=59
11x(3y+66)-2y=59
Let's name all the purchases "x"
so

of them were stuffed animals, and out of that

were bears.
to get the results we have to multiply the fraction of bears by the fraction of the stuff animals:

.
and now we simplify:

=

and this is the answer!
Answer: the answer is 0
Step-by-step explanation: