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
Answer:
as likely to occur
Step-by-step explanation:
becasue if the probabilty is 0.5 its 1/2 or 50/50 chance it will happen
Answer:
The explicit rule for the arithmetic sequence is given by:
......[1]
where,
is the first term
n is the number of terms and
d is the common difference for two consecutive terms.
As per the statement:
A recursive rule for an arithmetic sequence is:


The recursive formula for the arithmetic sequence is given by:

then;
On comparing we get;
d = -3
Substitute the given values in [1] we have;

⇒
Therefore, the explicit rule for this sequence is, 
Answer:
x<4
Step-by-step explanation:
3x<12
x<12/3
x<4
I hope this helps