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slava [35]
3 years ago
15

A survey find that 61% of people are married. They ask the same group of people and 75% of them have at least one kid. If 48% ar

e married and have one kid what is probability that a person in a survey is married or has a child?
Mathematics
1 answer:
dalvyx [7]3 years ago
5 0

Answer:

22/25

Step-by-step explanation:

The overlap between the 61% and the 75% is the 48%, which means that 13% of the people are married and have no kids (61-48=13)

The 75% includes the people who have one or more kids, and<em> </em>the people who have one or more kids <em>and</em> are married.

Now all we have to do is 13% + 75% = 88% = 22/25

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Answer:

144 children and 170 adults

Step-by-step explanation:

make 2 equations

make :

the children as the regarded as the variable : x

the adults are the regarded as the variable  : y

<em>5x + 6 y = 1740</em>

<em>x + y = 314</em>

<h3><u>solve this by the method of elimination </u></h3>

5x + 6y = 1740

5(x + y = 314)

= 5x + 5y = 1570

5x + 6y = 1740

5x + 5y = 1570

the 5x is cancelled out

6y - 5y = 1740 - 1570

y = 170

now replace the value of y in the eqaution

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5x =720

x = 144

hence they were 144 children and 170 adults

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