Time remaining:
Determine the Number of Playing Cards that Diana Have

Algebra
Tutor: None Selected Time limit: 1 Day

Diana had a large stack of playing cards. she knew that 17 of them were kings. she took a sample of 30 cards and found 4 kings. Approximately how many playing cards did Diana have?

Sep 3rd, 2014

If we assume the kings are distributed evenly throughout the cards, we can use a ratio to compare:

out of 30 cards there are 4 kings, x cards have 17 kings

30/4  = x/17

cross multiply:

4x = 510

divide:

127.5

there are approximately 128 cards



Sep 3rd, 2014

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Sep 3rd, 2014
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Sep 3rd, 2014
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