After giving 2/7 of his marbles to his brother and 2/5 of the remainder to his sister,Ji has 96 marbles How many marbles he have at first?
2006-10-11 22:59:10 · 6 answers · asked by preethi 1 in Science & Mathematics ➔ Mathematics
Please give ur answer in details
2006-10-11 23:06:20 · update #1
224
2006-10-11 23:03:24 · answer #1 · answered by Unchained 2 · 0⤊ 0⤋
Answer: 224
So 96 marbles equal 3/5 (60%) of the amount he had prior to giving marbles to his sister. Each fifth was therefore worth 32 marbles. So his total before giving marbles to his sister was 160 marbles.
The 160 marbles was 5/7 of the original total. Each 1/7 was worth 32. So the grand total was 224.
2006-10-12 06:11:00 · answer #2 · answered by Ericka 2 · 0⤊ 0⤋
224
2006-10-12 10:21:18 · answer #3 · answered by michaell 6 · 0⤊ 0⤋
let total no. of marbles he has be x
then his mother has 2/7 of x
and his sister has 2/5 of (5x/7)
=2x/7
he left with 96 marbles
that means
x= 2x/7 +2x/7 +96
x- 4x/7=96
3x= 96*7
x= 32*7
x= 224
2006-10-12 06:16:17 · answer #4 · answered by Nick 3 · 0⤊ 0⤋
148
2006-10-12 06:09:45 · answer #5 · answered by TMAC 5 · 0⤊ 0⤋
(2/5)*((2/7)X)=96
(2/5)*(2X/7)=96
4X/35=96
4x=96*35
x=(96*35)/4
x=24*35
x=840
2006-10-12 06:38:06 · answer #6 · answered by safrodin 3 · 0⤊ 0⤋