How to solve this Q?
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How to solve this Q?
Half the pieces of chalk in a box were white, the rest were coloured. A third of
the coloured ones were blue, a quarter of the rest were red and the others
were yellow. If there are 6 yellow ones, how many pieces of chalk were there
altogether.
Looks simple but the sum doesn't make sense. I may interpret 'a quarter of teh rest were red' wrongly.
Please help.
Thanks.
the coloured ones were blue, a quarter of the rest were red and the others
were yellow. If there are 6 yellow ones, how many pieces of chalk were there
altogether.
Looks simple but the sum doesn't make sense. I may interpret 'a quarter of teh rest were red' wrongly.
Please help.
Thanks.
Re: How to solve this Q?
We know there are 6 yellow.Gee wrote:Half the pieces of chalk in a box were white, the rest were coloured. A third of the coloured ones were blue, a quarter of the rest were red and the others were yellow. If there are 6 yellow ones, how many pieces of chalk were there altogether.
Half are coloured - third of these are blue so 1/6 blue.
The others are red and yellow; these are [1 - (1/2 + 1/6)] = 1/3
So if 1/4 of these are red 3/4 of this 1/3 are yellow ie 1/4 are yellow, so there are 24 altogether.
CHECK: 12 white, 12 coloured [4 blue, 2 red, 6 yellow]
Re: How to solve this Q?
Guest55 wrote:We know there are 6 yellow.Gee wrote:Half the pieces of chalk in a box were white, the rest were coloured. A third of the coloured ones were blue, a quarter of the rest were red and the others were yellow. If there are 6 yellow ones, how many pieces of chalk were there altogether.
Half are coloured - third of these are blue so 1/6 blue.
The others are red and yellow; these are [1 - (1/2 + 1/6)] = 1/3
So if 1/4 of these are red 3/4 of this 1/3 are yellow ie 1/4 are yellow, so there are 24 altogether.
CHECK: 12 white, 12 coloured [4 blue, 2 red, 6 yellow]
Thank you so much for the quick reply. Very well explained.