Considering the probabilities of getting each question right, his expected score for the test is 90.8.
<h3>How to find Joe's expected score?</h3>
Joe's expected score is given by the sum of the expected score for each question.
We have that:
- He is sure of 12 answers, hence for each he expects 6 points.
- He randomly guesses on 9 problems, hence he is expected to have a 1/5 probability of earning 6 on them.
- For the other 4 problems, he has a 1/3 probability of earning 6 on them, as he will guess from 3 options as he eliminated 2.
Hence his expected score is given by:
E(X) = 12 x 6 + 9 x 1/5 x 6 + 4 x 1/3 x 6 = 90.8.
More can be learned about the expected score of a distribution at brainly.com/question/13617733
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Answer:
a(t) = -8t + 124
Step-by-step explanation:
The number of apples left 3 days after picking them is given by the following equation:

3 days after picking apples, a family had 100 apples left.
This means that 
So



After 6 days, 76 apples were left.
So a(6) = 76. Then

Since b = 100 - 3m




b:

So
a(t) = -8t + 124.
Answer:
no it is not
Step-by-step explanation:
8 × 1 does not equal 2
Answer:
B. 70%
Step-by-step explanation:
7/10 of the numbers are more than 5
7/10= 70%
The number written in standard form is 24100
Step-by-step explanation:
An object is said to be written in scientific notation when it is written in the following form:

where
m is the coefficient
n is the exponent of the power of ten
The number can be rewritten in standard form by writing the coefficient and then moving to the right (or to the left) the decimal point by n positions if n is positive (or negative).
In this problem, the number is

So we have
m = 2.41
n = 4
Therefore, we have to write 2.41 and then move the decimal point 4 positions to the right: so we get

Learn more about scientific notation:
brainly.com/question/5565320
brainly.com/question/5756316
brainly.com/question/2867150
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