The number of marbles in Amin’s collection is 80% of the number in Rahim’s collection. If Rahim has 80 more marbles than Amin, how many marbles do they have altogether?
সমাধান
সঠিক উত্তর: Option A
If Rahim's Collection is X
Then, Amin's Collection is 0.8X
Now, A/Q,
X - 0.8X = 80
or, 0.2X = 80
or, X = 80/0.2 = 400
So, Rahim has 400 marbles
and Amin has 0.8*400 = 320 marbles
Together they have = 400+320 = 720 marbles
