Which of the biscuits are sold at the prices below the average of
Direction: Study the following graph and answer the Question.
The following table shows the five different types of Gold-Silver alloy Biscuits.
The following Pie - Chart shows the interest gain on selling the five different types of Gold-Silver alloy Biscuits.
Price of Gold per 10 grams = Rs. 42,000
Price of Silver per kg = Rs. 42,000
Question 1: Which of the biscuits are sold at the prices below the average of prices of all biscuits?
A. Only B5
B. Only B1 and B2
C. B1, B2 and B3
D. B1, B2 and B5
E. Only B2
Right Answer is: D
SOLUTION
Price of Gold per 10 grams = Rs. 42000
⇒ 42000/10 = Rs. 4200 per gram
Price of Silver per kg = Rs. 42000
⇒ 42000/1000 = Rs. 42 per gram
In Biscuit B1,
Silver = 2 grams
Cost of silver = 2 × 42 = Rs. 84
Gold = 3 grams
Cost of Gold = 3 × 4200 = Rs.12600
Total Cost of one B1 Biscuits = 84 + 12620 = Rs. 12684
In Biscuit B2,
Silver = 3 grams
Cost of silver = 3 × 42 = Rs. 126
Gold = 5 grams
Cost of Gold = 5 × 4200 = Rs. 21000
Total Cost of one B2 Biscuits = 126 + 21000 = Rs. 21126
In Biscuit B3,
Silver = 5 grams
Cost of silver = 5 × 42 = Rs. 210
Gold = 7 grams
Cost of Gold = 7 × 4200 = Rs. 29400
Total Cost of one B3 Biscuits = 210 + 29400 = Rs. 29610
In Biscuit B4,
Silver = 3 grams
Cost of silver = 3 × 42 = Rs. 126
Gold = 7 grams
Cost of Gold = 7 × 4200 = Rs. 29400
Total Cost of one B4 Biscuits = 126 + 29400 = Rs. 29526
In Biscuit B5,
Silver = 1 grams
Cost of silver = 1 × 42 = Rs. 42
Gold = 4 grams
Cost of Gold = 4 × 4200 = Rs. 16800
Total Cost of one B5 Biscuits = 42 + 16800 = Rs. 16842
Average Cost of all five Biscuits = (12684 + 21126 + 29610 + 29526 + 16842)/5
= 21957.6
Hence, B1, B2 and B5 biscuits are being sold below the average price.
