What is the decimal and fraction to 87.5%

Mathematics

2 answers:

Bas_tet [7]3 years ago

7 0

Decimal:

0.875

Fraction:

7/8

777dan777 [17]3 years ago

5 0

Decimal: 0.875. To solve, you must know that 10% is 0.1 and 1% is 0.01. So, you move 2 decimal places to the left, which makes it 0.875.

Fraction: 875/1000. This time, we moved the decimal place to the right. We also have to move the hundreds by one, so it would become thousand.

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You can select 1 girl from a group of 4 girls in 4 ways.
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$(^6 _2)=\frac{6!}{2! (6-2)!}=\frac{6!}{2! \times 4!}=\frac{4! \times 5 \times 6}{2 \times 4!}=\frac{5 \times 6}{2}=\frac{30}{2}=15$
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Using the rule of product, you can calculate that you can choose 1 girl and 2 boys in 4×15=60 ways.

The probability of choosing 1 girl and 2 boys is the number of ways you can choose 1 girl and 2 boys divided by the number of ways you can choose 3 people from the group.
$P=\frac{60}{120}=\frac{1}{2}=50\%$

The probability is 1/2, or 50%.

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