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Karolina [17]
3 years ago
6

3 plus the quotient of a number and 2 is 7. What is the number?​

Mathematics
2 answers:
Sidana [21]3 years ago
8 0
3 + x/2 = 7
x = (7-3)*2 = 8 = the number
TEA [102]3 years ago
3 0

Answer:

The required number is 8.

Step-by-step explanation:

Let the required number be <em>x</em>.

Now, it is given that, 3 plus quotient of a number and 2 is 7, then

3 + \frac{x}{2}=7

Subtracting '3' from both sides of the above equation, we get

3 + \frac{x}{2}-3=7-3

\implies\frac{x}{2} =4

Now, multiplying both sides by '2' in the above obtained equation, we get

\frac{x}{2}\times2 = 4\times2

\implies x = 8

So, the required number is 8.

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Suppose that you randomly draw one card from a standard deck of 52 cards. After writing down which card was drawn, you replace t
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Step-by-step explanation:

The variable X follows a binomial distribution, because we have n identical and independent events (19 cards) with a probability p of success and 1-p of fail (there is a probability of 1/4 to be club and 3/4 to be diamond, heart or spade). Then, the probability that x of the n cards are club is:

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Additionally, the expected value E(x) and standard deviationS(x) for this distribution is given by:

E(x)=np = 19(0.25) = 4.75

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