Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2010-06-28 23:31:26

haftakhan
Member
Registered: 2010-06-28
Posts: 30

Ratio answer confirmation

in a league male to female ratio is 6:5.If there are 138 players in the league ,How many are female ?

A)6/11*138=76 females

is it right ?

Offline

#2 2010-06-28 23:49:03

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: Ratio answer confirmation

Nearly, you just needed to use the other number.

Male:Female :: 6:5, so you want to multiply by 5/11 instead.


Why did the vector cross the road?
It wanted to be normal.

Offline

#3 2010-06-29 00:00:57

haftakhan
Member
Registered: 2010-06-28
Posts: 30

Re: Ratio answer confirmation

is this question right ?

Given that A,B,C and D are whole numbers.Such that A+B=8,B+D=11,B+D=13 and C+D=14
find the value of A,B,C,D ?

in this question B+D had two values.

Is this question right ?

Offline

#4 2010-06-29 00:41:39

ZHero
Real Member
Registered: 2008-06-08
Posts: 1,889

Re: Ratio answer confirmation

Probably not.
One of the "B+D" should be "A+D".

Last edited by ZHero (2010-06-29 00:41:53)


If two or more thoughts intersect, there has to be a point!

Offline

#5 2010-06-29 10:06:53

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Ratio answer confirmation

Hi haftakhan;

Changing the B+D=13 To:

B + C = 13:  A=3,B=5,C=8,D=6

A + D = 13:  A=5,B=3,C=6,D=8

A + C = 13:  No Solution!

Given that A,B,C and D are whole numbers.Such that A+B=8,B+D=11,B+D=13 and C+D=14
find the value of A,B,C,D ?

Although it looks like a typo, the problem is perfectly acceptable. It just has no solution.

Systems that simplify down to false (for example, equations such as 1 = 0). Such systems have no points of intersection and no solutions.

B + D = 11
B + D = 13

Subtract the above equations from each other.

0 = - 2   False


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

Board footer

Powered by FluxBB