what is the probability of two digit odd number formed from the digit 2,3,5,7,9 without repetition . Also find the probability of the event (i) the number so formed is an odd number (ii) the two digit number so formed is multiple of5 .
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21
Total Number taking two digits together = 5 x 4
= 20
For odd number unit digit should be 3,5,7,9
Total possible number = 16
Probability = 16/20 = 4/5 = 0.8
(ii) Number is divisible by 5 only when unit place is 5 so only total five number possible P= 5/20 = 1/4 = 0.25
= 20
For odd number unit digit should be 3,5,7,9
Total possible number = 16
Probability = 16/20 = 4/5 = 0.8
(ii) Number is divisible by 5 only when unit place is 5 so only total five number possible P= 5/20 = 1/4 = 0.25
varshasanjana:
2) NUMBER IS DIVISIBLE BY 5 ONLY WHEN UNITS PLACE IS 5 SO FIRST PLACE CAN BE FILLED IN ONLY 1 WAY . NOW THERE ARE 4 NUMBERS REMAINING FOR THE SECOND PLACE THEREFORE E (s) =4
n(s) =20 then p(s)=4/20=1/5
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6
THE PROBABILITY OF TWO DIGIT ODD NO. FORMED FROM THE DIGITS IS 4/5
1) 4/5
2)1/5
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