Problems on Numbers - Quantitative Aptitude (MCQ) questions for Q. 90

Q.  A pineapple costs Rs 7 each and a watermelon costs Rs. 5 each. If I spend Rs 38 on total what is the number of pineapple I purchased?
- Published on 15 Jun 15

a. 2
b. 3
c. 4
d. Data Inadequete

ANSWER: Data Inadequete
 
The equation for this problem can be made as:

5x + 7y =38
Where x is the number of watermelons and y is the number of pineapples.
Now test for 2, 3 and 4:
For y = 2
5x + 14 =38
x is not an integer
For y = 3
5x = 17
X not an integer
For y =4
X = 2
So 4 pineapples and 2 watermelons can be bought by 38 Rs.

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