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NikAS [45]
3 years ago
9

You spend 1/5 of your income on car payment. You spend 3/8 of the remainder of your income on rent. What fraction of income is s

pent on rent?
Mathematics
1 answer:
kenny6666 [7]3 years ago
5 0

Answer:

3/10

Step-by-step explanation:

1/5 of <u>total</u> income - spent on car

<u>remainder</u><u> </u> income = 4/5

3/8 of <u>remainder</u><u> </u>= 3/8 ×4/5 = 3/10(of total income spent on rent)

the word "<u>of</u>" means you can find it by multiplication

e.g. 2 of 1/2 means 2 × 1/2 which is 1

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Step-by-step explanation:

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Hareb is saving money to buy a game so far he saved 24$ which is two thirds of the total cost of the game does the game cost
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Answer:

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3 years ago
The age of some lecturers are 42,54,50,54,50,42,46,46,48 and 48 calculate the mean age and standard deviation
rjkz [21]

Answer:

Mean age: 48

Standard deviation: 4

Step-by-step explanation:

a) Mean

The formula for Mean = Sum of terms/ Number of terms

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= 42 + 54 + 50 + 54 + 50 + 42 + 46 + 46 + 48+ 48/ 10

= 480/10

= 48

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b) Standard deviation

The formula for Standard deviation =

√(x - Mean)²/n

Where n = number of terms

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= √-6² + 6² + 2² + 6² + 2² + -6² + -2² + -2² + 0² + 0²/10

=√36 + 36 + 4 + 36 + 4 + 36 + 4 + 4 + 0 + 0/ 10

=√160/10

= √16

= 4

The standard deviation of the ages is 4

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