Part (a)
Answer: 0.15
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Explanation:
Let x be the missing value that goes in the box.
This x value adds with the other probabilities to get 0.35+0.4+0.1+x which simplifies to 0.85+x
Set this equal to 1 and solve for x and you should get x = 0.15
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Part (b)
Answer: 0.45
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Explanation:
Add the probabilities for cat and hamster getting 0.35+0.1 = 0.45
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Part (c)
Answer: 0.16
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Explanation:
Because the two events are independent, we can multiply the probability of getting a dog with itself, so,
0.4*0.4 = 0.16
