A true or false test has five questions if you guess the answers what is the probability that you will get all five correct?

1 answer:

4 0

You have two outcomes in a true or false test - you can choose option "true" or option "false". The probabolity to guess correct answer for one question is 1/2.

Use the product rule to count the probability getting all five correct answers:

$Pr=\dfrac{1}{2} \cdot \dfrac{1}{2} \cdot \dfrac{1}{2} \cdot \dfrac{1}{2} \cdot \dfrac{1}{2}=\dfrac{1}{32}$ .

Answer: The probability that you will get all five correct answers is $Pr=\dfrac{1}{32}$ .

You might be interested in

Otto used 6 cups of whole wheat flour and x cups of white flour in the recipe. What is the equation that can be used to find the

nadezda [96]

Y = 6 + x

We can use this equation to find the total amount of flour that Otto used in the recipe.

The constraints on 'x' and 'y' are that they must both be positive, because we cannot have a negative amount of flour.

<span>And a restraint something like 50 cups of flour total because one person making a recipe won't use that many cups of flour.</span>

5 0

4 years ago

James went out for. a long walk . he walked 3/4 mile and then sat down to take rest. then walked 1/8 of a mile how far did he wa

Karo-lina-s [1.5K]

change 3/4 to 6/8 and add 6/8 and 1/8 to get 7/8

he walked 7/8 miles in total :)

6 0

3 years ago

Deon earns $91 washing 7 dogs. At this rate, how many dogs did Deon wash to earn $117?

mamaluj [8]

$91/ 7 = $13 per dog
$117/$13 = 9 dogs
He washed 9 dogs

4 0

3 years ago

A pharmacist has a 12% solution and a 20% solution of boric acid. How much of each should she use to make 80 grams of a 15% solu

nlexa [21]

Step-by-step explanation:

If x = the amount of 12% and y = the amount of 20%, then x + y = 80

Since we need 80 grams of 15%, 80(.15) = 12.

We are given that .12x + .20y = 12.

We can solve the first equation for x or y. Let's do x.

x = 80 - y

.12(80 - y) + .20y = 12

9.6 - .12y + .20y = 12

.08y = 2.4

y = 30

x = 80 - 30 = 50

5 0

3 years ago

Read 2 more answers

The product of two numbers is 20. If one number is 5/7 what is the other number

Nostrana [21]

28. 5/7(x)=20

X=28

Hope this helps! :)

5 0

3 years ago