Answer:
The variance for the number of tasters is 4.2
Step-by-step explanation:
For each person, there are only two possible outcomes. Either they are tasters, or they are not. The probability of a person being a taster is independent of any other person. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The variance of the binomial distribution is:
It is known that 70% of the American people are "tasters" with the rest are "non-tasters". Suppose a genetics class of size 20
This means that
So
The variance for the number of tasters is 4.2
51 x 8 = 408
It can be in this way: 51*8=408
Answer:
total number of students = 41
Step-by-step explanation:
A different class is made up of 66% women and has 27 women in it.
Let x be the total number of students in the class
66% of students are women
66% of women are 27 women
66 % of x is 27
divide both sides by 66
x=41
So total number of students = 41
Answer:
4/3
Step-by-step explanation:
find common denomerator which is 12
so times 3/4 by 3
now its 9/12 + 7/12
get 16/12