In a scientific study there are 7 guinea pigs, 4 of which are pregnant. If 3 are selected at random without replacement, find th
1 answer:
The chances of selecting a pregnant guinea pig involves probability
The probability that all are pregnant is 0.187
<h3>How to determine the probability</h3>Probabilities are used to determine the chances of events
From the question, 4 out of 7 guinea pigs are pregnant.
So, the probability that a selected guinea pig is pregnant is:
The probability that all the selected 3 are pregnant is then calculated as:
Evaluate the product
Hence, the probability that all are pregnant is 0.187
Read more about probability at:
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The common ratio of both the formulas is 3 and 2. The first formula is explicit and the second is the recursive formula.
<h3>What is the recursive rule?</h3>A rule is defined such that its definition includes itself.
1.
The given sequence is
-2, -6, -18, -54
Common ratio ;
r = -6 / -2 = 3
This given formula is the explicit formula.
2.
The given sequence is
4, 8, 16, 32
Common ratio ;
r = 8 / 4 = 2
This given formula is the recursive formula.
Learn more about the recursive rule and explicit rules here:
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