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Maths Puzzle
Two dices are thrown. What is the probality that the the number on the first dice is greater or equal to number on the second dice?
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- If first number is 6, then the probality that the the number on the first dice is greater or equal to number on the second dice = 1/6 *6/6 = 6/36=1/6
If first number is 5, then the probality that the the number on the first dice is greater or equal to number on the second dice = 1/6 * 5/6 = 5/36
If first number is 4, then the probality that the the number on the first dice is greater or equal to number on the second dice = 1/6 *4/6=4/36
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considering all cases, the probality that the the number on the first dice is greater or equal to number on the second dice = 6/36 +5/36 +4/36 +..+1/36 =
(1+2+3+4+5+6)/36 = 21/36 = 7/12 - 12 years agoHelpfull: Yes(3) No(0)
- Total outcomes will be 6*6=36 like (1,1)(1,2),......,(6,6)
Out of that total possible conditions=21 like(1,1)(2,1)(2,2)(3,1)(3,2)(3,3)(4,1)(4,2)(4,3)(4,4)(5,1)(5,2)(5,3)(5,4)(5,5)(6,1)(6,2)(6,3)(6,4)(6,5)(6,6)
Therefore Probability=21/36=7/12 - 12 years agoHelpfull: Yes(3) No(3)
- 1/6*1/6+1/6*2/6+1/6*3/6+1/6*4/6+1/6*5/6+1/6*6/6=7/12.........in every multiplication term 1/6 stands for probability of getting 1,2,3,4,5,6 on 1st die respectively and 2nd term for getting ......ex.if we get 3 on 1st die then we can have 1,2,3 on 2nd die thus 1/6*3/6....similarly for all cases
- 12 years agoHelpfull: Yes(0) No(1)
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