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3 years ago

2. Out of 35 students participating in a debate, 10 are girls. The probability that winner is a boy is: a)1/7 b)3/7 c)4/7 d)5/7

Mathematics

1 answer:

Gnoma [55]3 years ago

3 0

Answer: d) 5/7

Step-by-step explanation:

10 out of 35 of the students are girls. The number of boys is therefore:

= 35 - 10

= 25 boys

Probability that the winner is a boy is:

= 25/35

Take that fraction to the simplest by dividing both by 5:

= 5/7

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3 years ago

Paloma can run the 100 meter dash in the 16 1/5 seconds Savannah’s best time is 19.8 seconds how much faster is Paloma than Sava

olga_2 [115]

Answer:

$3\frac{3}{5}\ sec$ or $3.6\ sec$

Step-by-step explanation:

we know that

To find out how much faster is Paloma than Savannah in the 100- meter dash, subtract the Paloma's time from the Savannah's time

$19.8-16\frac{1}{5}$

step 1

Convert mixed number to an improper fraction

$16\frac{1}{5}\ sec=\frac{16*5+1}{5}=\frac{81}{5}\ sec$

step 2

Convert decimal number in fraction number

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Simplify

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step 3

Substitute the values

$19.8-16\frac{1}{5}=\frac{99}{5}-\frac{81}{5}=\frac{18}{5}\ sec$

Convert to mixed number

$\frac{18}{5}\ sec=\frac{15}{5}+\frac{3}{5}=3\frac{3}{5}\ sec$

Convert to decimal number

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4 years ago