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 Author: Decisiontime639 [ Mon Oct 26, 2020 6:14 pm ] Post subject: question help hi, anyone able to help with this question?65% of juniors wear uniform.35% seniors wear uniform.43% of whole school wear uniformwhat percentage of whole school are juniors?thanks!

 Author: Guest55 [ Mon Oct 26, 2020 7:07 pm ] Post subject: Re: question help Where did you get this question?

 Author: KenR [ Tue Oct 27, 2020 6:27 pm ] Post subject: Re: question help Sounds like an advanced final question for Independent 11+ schools which is more easily solved using algebra; this shouldn't be in state school 11+ examsviz. If you let y be the total school population and,x be the junior population, then (y-x) is the senior population.Using algebra write down expressions for the information provided.You then need to re-arrange this expression to give (x/y) x 100 = which is the percentage of junior pupils in the school.I think the answer works out at 26.67%

 Author: Guest55 [ Tue Oct 27, 2020 8:29 pm ] Post subject: Re: question help I needed algebra too - hence my question.I tackled it slightly differently but agree on the answer 26.67% [to 2 dp]

 Author: Bluearrow [ Sun Nov 08, 2020 11:35 am ] Post subject: Re: question help Decisiontime639 wrote:hi, anyone able to help with this question?65% of juniors wear uniform.35% seniors wear uniform.43% of whole school wear uniformwhat percentage of whole school are juniors?thanks!35% of the juniors + 35% of the seniors = 35% of the whole schoolso 30% of the junior (65%-35%) is the same as 8% of the whole schoolhence number of students in the whole school is 30/8 times the number in the juniorsor the juniors are 8/30=26.67% of the whole school

 Author: Surferfish [ Wed Nov 11, 2020 4:12 pm ] Post subject: Re: question help I used simultaneous equations (j= no of juniors, s = no of seniors, t = total number of pupils) j + s = t (1) 0.65j + 0.35s = 0.43t (2) (1) * 0.35 -> 0.35j + 0.35s = 0.35t (3)(2) - (3) -> 0.3j = 0.08tj = 0.08/0.3 tj = 0.267t

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