Tamara finds the sum of two number cubes rolled at the same time. The chart below shows all possible sums from the 36 possible c
ombinations when rolling two number cubes. How many times should Tamara expect the sum of the two cubes be equal to 5 if she rolls the two number cubes times?
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Answer:
There are a 25% probability that Christine fails the course.
Step-by-step explanation:
We have these following probabilities:
A 50% probability that Christine finds a tutor.
With a tutor, she has a 10% probability of failling.
A 50% probability that Christine does not find a tutor.
Without a tutor, she has a 40% probability of failing.
Probability that she fails:
10% of 50%(fail with a tutor) plus 40% of 50%(fail without a tutor). So
There are a 25% probability that Christine fails the course.