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3 years ago

28% of what number is 63

Mathematics

2 answers:

Alona [7]3 years ago

7 0

28/100= x/63

28*63=1764.
100*x=100x
We divide 100 both sides.
What will be the Answer?

Scrat [10]3 years ago

6 0

We set up a proportion: 63/?= 28/100

Cross multiply: 28*?= 63*100
⇒ ?= 63*100/28= 225

28% of 225 is 63.

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How would you solve this?

finlep [7]

Answer:the probability that a pensioner catches a flu is 0.3 or $\frac{3}{10}$

Step-by-step explanation:

Data:

a) Pensioners who have had a flu jab = $\frac{3}{5}$

b) Pensioners who did not had a flu jab = 1 - $\frac{3}{5}$ = $\frac{2}{5}$

For the first pair of arrows: a is the probability of the upper arrow and b is the probability of the lower arrow.

If pensioner have had a flu jab, the probability of catching flu is $\frac{1}{30}$

Data:

c) Catching flu = $\frac{1}{30}$

d) Not catching flu = 1 - $\frac{1}{30}$ = $\frac{29}{30}$

The second pair of arrows on the top: Top arrow is c and bottom arrow is d

If pensioner did not have a flu jab, the probability of catching flu is $\frac{7}{10}$

Data:

e) Catching flu = $\frac{7}{10}$

f) Not catching flu = 1 - $\frac{7}{10}$ = $\frac{3}{10}$

The second pair of arrows on the bottom: Top arrow is e and bottom arrow is f.

Q) Probability pensioner catches a flu

P(catches the flu given that he had the flu jab) + P(catches the flu given that he did not have the flu jab)

( $\frac{3}{5}$ x $\frac{1}{30}$ ) + ( $\frac{2}{5}$ x $\frac{7}{10}$ )

= 0.02 + 0.28

= 0.3

Therefore, the probability that a pensioner catches a flu is 0.3 or $\frac{3}{10}$

Keyword: Probability

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5 0

3 years ago

What is the opposite of the opposite of -2

melisa1 [442]

Answer:

2 is the opposite of-2 and -2 is the opposite of 2

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I am Lyosha [343]

Answer:

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Step-by-step explanation:

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3 years ago

What is the simplified value of the exponential expression 16^1\4

Natalka [10]

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Now, if you use the exponent rule $(a^b)^c = a^{bc}$ , you may rewrite the expression again:

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antiseptic1488 [7]

Answer:

Step-by-step explanation:

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