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sergey [27]
2 years ago
5

1. Suppose that out of 3030 gift cards in a

Mathematics
1 answer:
Bad White [126]2 years ago
3 0

Answer:

1. If the 3030 is supposed to be 30, and 77 is supposed to be 7, your answer would be 7/30.

2. 25%

3. 13

Step-by-step explanation:

:)

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Answer:

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20 people applied for a job. Everyone either has a school certificate or diploma or even both. If 14 have school certificates an
STatiana [176]

Given:

Either has a school certificate or diploma or even both = 20 people

Having school certificates = 14

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To find:

The number of people who have a school certificate only.

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Let A be the set of people who have school certificates and B be the set of people who have diplomas.

According to the given information, we have

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n(B)=11

n(A\cup B)=20

We know that,

n(A\cup B)=n(A)+n(B)-n(A\cap B)

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20-25=-n(A\cap B)

-5=-n(A\cap B)

5=n(A\cap B)

We need to find the number of people who have a school certificate only, i.e. n(A\cap B').

n(A\cap B')=n(A)-n(A\cap B)

n(A\cap B')=14-5

n(A\cap B')=9

Therefore, 9 people have a school certificate only.

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Step-by-step explanation:

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Step-by-step explanation:

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