Solve This - Education - Nairaland
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| Solve This by Zuru1(op): 7:21pm On Nov 01, 2017 |
during one year in a school 5/8 of the students had measles, 1/2 had chicken pox and 1/8 had neither. what fraction of the school had both measles and chicken pox show working |
| Re: Solve This by Sugar97(f): 3:41am On Nov 02, 2017 |
Let the fraction of those who had both be X Then 5/8 + 1/2 + 1/8 - X = 1 (Since there are only 4 possible outcomes viz. Only measles,, only chicken pox, neither and both) Now solve for X, that should be easy  Add all like terms on LHS to have 5/4 - X = 1 X = 5/4 - 1 = 1/4 Therefore, the fraction of those who had both diseases is 1/4 |
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