Brain Teasers
CD Sale
Fun: (2.15)
Difficulty: (1.93)
Puzzle ID: #18223
Submitted By: Therulerofthem Corrected By: Winner4600
Submitted By: Therulerofthem Corrected By: Winner4600
There was a sale going on at the CD store. To make it easier for the store, they needed to find out how many CDs were in each different style of music. 25% were blues, 15% were pop, 25% were classical and 15% were rock. The remaining 24 CD's are jazz.
How many CDs are in each style?
How many CDs are there in total?
How many CDs are in each style?
How many CDs are there in total?
Answer
First you add up the percents:25% + 15% + 25% + 15% = 80%
Subtract 80% from 100% to get 20% (the percentage of jazz CDs).
Divide 24 by 20 to get 1.2 (that is, 1% corresponds to 1.2 CDs) then multiply the percentages by 1.2 to get how many CDs are in each musical style.
Blues: 25% x 1.2 = 30 CDs
Pop: 15% x 1.2 = 18 CDs
Classical: 25% x 1.2 = 30 CDs
Rock: 15% x 1.2 = 18 CDs
These are the answers to the first question.
To find the second answer:
30 + 18 + 30 + 18 + 24 = 120 CDs in total.
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