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  1. Two baskets together have 640 oranges. If
    1
    th
    5
    of the oranges in the first basket be taken to the second basket. The number of oranges in the first basket is
    1. 800
    2. 600
    3. 400
    4. 300
Correct Option: C

Let the number of oranges in the first basket be x.
∴  Number of oranges in the second basket = 640 – x
According to the question,

x −
x
= 640 – x +
x
55

= 640 −x −
x
5

⇒ 
4x
= 640 –
4x
55

⇒ 
4x
+
4x
= 640
55

⇒ 
8x
= 640 ⇒ 8x = 640 × 5 = 640
5

⇒ 
x =
640 × 5
= 400
8



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