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Umnica [9.8K]
3 years ago
12

A group of 5 painters takes 21 hours to paint a house. How long would it take a group of 7 painters to paint the same house?

Mathematics
2 answers:
VladimirAG [237]3 years ago
5 0

Answer:

29.4

Step-by-step explanation:

if 5  painters takes 21 hours that makes it 4.5 per person so multiply that by 7 and there you go!

lord [1]3 years ago
5 0

Answer:

15

hope it helps

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Find the value of x of the circle, and show the work of the equation:
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8 0
3 years ago
There are 135 people and three door prizes. how many ways can door prizes of $7,500, $750 and $75 be distributed?
igomit [66]

Answer: 2405970 ways

Step-by-step explanation:

When the order of selecting r individuals out of n individual , we use permutations.

The number of permutations of r things taking out of n things is given by :-

^nP_r=\dfrac{n!}{(n-r)!}

Given : There are 135 people and three door prizes .

i.e. n= 135 , r= 3

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=\dfrac{135\times134\times133\times132!}{132!}\\\\=135\times134\times133\\\\=2405970

Hence, there are 2405970 ways to distribute door prizes of $7,500, $750 and $75 .

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