Then, x + 5x + 10x = 480 ⟺ 16x = 480 ⟺ x = 30.
Hence, total number of notes = 3x = 90.
Then, 2x + 3y = 77 ...(i) and
3x + 2y = 73 ...(ii)
Multiplying (i) by 3 and (ii) by 2 and subtracting, we get: 5y = 85 or y = 17.
Putting y = 17 in (i), we get: x = 13.
Let Manick be twice as old as Rahul after x years from now.
Then, 12 + x = 2 (4 + x) ⟺ 12 + x = 8 + 2x ⟺ x = 4.
Hence, Manick's required age = 12 + x = 16 years.
Now, 3x = (x + x + £ 3) + £ 2 ⟺ x = £ 5.
Therefore Total money with Mac and Ken = 2x + £ 3 = £ 13.
His mother's present age = (10 + 20) years = 30 years.
Ayush's father's present age = (30 + 5) years = 35 years.
Ayush's father's age at the time of Ayush's birth = (35 - 10) years = 25 years.
Therefore Ayush's father's age at the time of marriage = (25 - 2) years = 23 years.
So, required number = 10 + 10 = 20.
Then, .
R + G + B = 108 ...(i),
G + R = 2B ...(ii)
B = 2R ...(iii)
From (ii) and (iii), we have G + R = 2x 2R = 4R or G = 3R.
Putting G = 3R and B = 2R in (i), we get:
R + 3R + 2R = 108 ⟺ 6R = 108 ⟺ R = 18.
Therefore Number of balls in green box = G = 3R = (3 x 18) = 54.
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