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1. Cards marked with the numbers 2 to 101 are placed in a box. One card is drawn at random. Find the probability that the card drawn bears a number which is a perfect cube. |
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Answer» Step-by-step EXPLANATION: option is A 1: 2 1
,2: 25 3
,3: 100 9
,4: 25 2
1)Number on cards are 2 to 101 Even number are 2,4,6,..,100=50 Probability that it's an even number =50/100=1/2 2)Numbers less than 14 are 2,3,4,5,6,7,8,9,10,11,12,13=12 Probability=12/100=3/25 3) Perfect square are=4,9,16,25,36,49,64,81,100=9 Probability=9/100 4) PRIME number less than 20 are 2,3,5,7,11,13,17,19=8 Probability=8/100=2/25 |
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