# Answer to Question #20293 in Algebra for Mikayla

Question #20293

Christos scored 80% in his automotive exam. There were 25 questions.

a. how many questions did he get right?

b. How many questions did he get wrong?

a. how many questions did he get right?

b. How many questions did he get wrong?

Expert's answer

Christos scored 80% in his automotive exam. There were 25 questions.

&

a. how many questions did he get right?

As Christos scored 80% of all the questions, then he got right

R = 25 * (80%/100%) = 25 * 0.8 = 20

questions.

b. How many questions did he get wrong?

As Christos scored 80% of all the questions, then he failed 100%-80% = 20% of them and so he got wrong

R = 25 * (20%/100%) = 25 * 0.2 = 5

questions.

&

a. how many questions did he get right?

As Christos scored 80% of all the questions, then he got right

R = 25 * (80%/100%) = 25 * 0.8 = 20

questions.

b. How many questions did he get wrong?

As Christos scored 80% of all the questions, then he failed 100%-80% = 20% of them and so he got wrong

R = 25 * (20%/100%) = 25 * 0.2 = 5

questions.

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