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The Average Number Of Visitors Of A Library In The First 4 Days Of A Week Was 58. The Average For The 2nd, 3rd, 4th And 5th Days Was 60.if The Number Of Visitors On The 1st And 5th Days Were In The Ratio 7:8 Then What Is The Number Of Visitors On The 5th Day Of The Library? |
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Answer» If number of VISITORS on 1st, 2nd, 3rd, 4th & 5th day are a, b, c, d & E RESPECTIVELY, then a+b+c+d=58*4=232 ----(i) b+c+d+e=60*4=240 ----(ii) Subtracting EQ. (i) from (ii) e-a=8 ---(iii) Given, a/e=7/8 ---(iv) So from eq. (iii) & (iv) a=56, e=64. If number of visitors on 1st, 2nd, 3rd, 4th & 5th day are a, b, c, d & e respectively, then a+b+c+d=58*4=232 ----(i) b+c+d+e=60*4=240 ----(ii) Subtracting eq. (i) from (ii) e-a=8 ---(iii) Given, a/e=7/8 ---(iv) So from eq. (iii) & (iv) a=56, e=64. |
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