In how many ways can five indistinguishable rooks be placed on an 8-by-8 chess- board so that no rook can attack another and nei
1 answer:
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Answer:
Step-by-step explanation:
926/71 = 13 Remainder 3
Rachel and her sister Fran together can paint the living room in hours
Given that
Rachel can paint half of the living room in 1 hour
Fran can paint th part of the living room in 1 hour
Let's assume together they paint the living room in x hours
⇒ together they can paint th part of the living room in 1 hour
By proportions,
⇒+
=
{using operation proportions and addition}
⇒=
⇒x=
⇒ together they can paint th part of the living room in 1 hour
It means, Rachel and her sister Fran together can paint the living room in hours
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