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Elza [17]
3 years ago
8

Katie has a 75% chance of making an A on a test. What is the probability that she will not make an A on her next two test: Algeb

ra and Physics?
A) 3.125%
B) 6.25%
C) 12.5%
D) 25%
Mathematics
2 answers:
andreev551 [17]3 years ago
5 0
I am pretty sure it's B 6.25% but I'm not exactly sure
babunello [35]3 years ago
4 0

Answer: B) 6.25%

Step-by-step explanation:

Let T be the event of making grades on a test by Katie.

Given: The probability that she will not make an A on test P(T)=75%= 0.75

The probability that she will not make an A on test is given by :-

P(T)'=1-P(T)\\\\\\Rightarrow\ P(T)'=1-0.75\\\\\Rightarrow P(T)=0.25

Since all the events of making grades are independent.

Therefore, the probability that she will not make an A on her next two test: Algebra and Physics is given by :-

P(\text{Algebra and Physics})=P(T)\times P(T)\\\\\Rightarrow0.25\times0.25=0.625

In percent, 0.625\times100=6.25\%

Hence, the probability that she will not make an A on her next two test: Algebra and Physics = 6.25%.

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