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Anika [276]
3 years ago
5

You randomly select one card from 52 -card deck fend the probability of selecting an ace or a 7

Mathematics
1 answer:
marta [7]3 years ago
7 0

Answer:

1 in 13 cards

Step-by-step explanation:

4\ 52 simplified is 1/13

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You have a 5-question multiple-choice test, then n=5. The <span>probability that you will guess exactly three out of five questions correctly is </span>
<span /><span>
</span><span>C_n^kp^nq^{n-k}=C_5^3p^3q^{5-3}= \dfrac{5!}{3!\cdot 2!} \left( \dfrac{1}{4} \right)^3\left( \dfrac{3}{4} \right)^2=\dfrac{1\cdot 2\cdot 3\cdot 4\cdot 5}{1\cdot 2\cdot 3\cdot 1\cdot 2} \cdot \dfrac{9}{1024} =</span>
= \dfrac{90}{1024} = \dfrac{45}{512}.
<span />

6 0
3 years ago
Read 2 more answers
2(2³-2²)<br><br> Can you also show how you solved it? Thanks.
valina [46]
The answer is 2[2^2(2-1)]=2*4*1=8
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