So, at the beginning there are a total of 25*3=75 siblings (we can assume that each of them had exactly 3 siblings, that's what average means; that we can assume this).
Now we have 25+1=26 students and the number of siblings is 75+8=83
and the average is
, and rounded it's 3.19.
Answer:
96 postcards
Just multiply 12 my 8. Since we have the ammount of postcards Jennifer has, the second sentence simply tells us that we need to multiply it by 8 because Frieda had 8 times the ammount as Jennifer did.
(30×6=180)+(30×6=180)×6×4=24+180+180=384
Answer:
the answer is A since it forms a pattern :>
The proportion of production that is defective and from plant A is
... 0.35·0.25 = 0.0875
The proportion of production that is defective and from plant B is
... 0.15·0.05 = 0.0075
The proportion of production that is defective and from plant C is
... 0.50·0.15 = 0.075
Thus, the proportion of defective product that is from plant C is
... 0.075/(0.0875 +0.0075 +0.075) = 75/170 = 15/34 ≈ 44.12%
_____
P(C | defective) = P(C&defective)/P(defective)
