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inysia [295]
3 years ago
11

Which is the correct choice ?

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
8 0
The answer is b! Good luck on the rest
You might be interested in
Joe takes part in math competitions. A particular contest consists of 25 multiple-choice questions, and each question has 5 poss
marshall27 [118]

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

#SPJ1

7 0
2 years ago
3 days after picking apples, a family had 100 apples left. After 6 days, 76 apples were left. Assuming a linear function, write
fredd [130]

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:

a(t) = mt + b

3 days after picking apples, a family had 100 apples left.

This means that a(3) = 100

So

100 = 3m + b

3m + b = 100

b = 100 - 3m

After 6 days, 76 apples were left.

So a(6) = 76. Then

76 = 6m + b

Since b = 100 - 3m

76 = 6m + 100 - 3m

3m = -24

m = \frac{-24}{3}

m = -8

b:

b = 100 - 3m = 100 - 3*(-8) = 124

So

a(t) = -8t + 124.

5 0
4 years ago
Is (1, 2) a solution to the equation y = 8x?
Rom4ik [11]

Answer:

no it is not

Step-by-step explanation:

8 × 1 does not equal 2

4 0
3 years ago
I need help plz help
ivanzaharov [21]

Answer:

B. 70%

Step-by-step explanation:

7/10 of the numbers are more than 5

7/10= 70%

5 0
3 years ago
Read 2 more answers
Express 2.41 x 10/4 in a standard form.
kakasveta [241]

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:

m\cdot 10^n

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

2.41\cdot 10^4

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

2.41\cdot 10^4 = 24100

Learn more about scientific notation:

brainly.com/question/5565320

brainly.com/question/5756316

brainly.com/question/2867150

#LearnwithBrainly

7 0
4 years ago
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