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if 4 digit numbers greater than 5000 are randomly formed from the digits 1,3,5,7&0,what is the probability of forming a number divisible by 5 when, 1.the digits are repeated? 2.the repetition of digits is not allowed?
 one year ago
 one year ago
if 4 digit numbers greater than 5000 are randomly formed from the digits 1,3,5,7&0,what is the probability of forming a number divisible by 5 when, 1.the digits are repeated? 2.the repetition of digits is not allowed?
 one year ago
 one year ago

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JOYALBest ResponseYou've already chosen the best response.0
yes... please explain the steps...
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.2
To be divisible by 5 the last digit must be either 0 or 5
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.2
So, 2/number of different digits we can choose for the last digit = 2/5
 one year ago

JOYALBest ResponseYou've already chosen the best response.0
so,what's the answer for 2 case??????????????
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.2
(1*1*3*2 + 1*2*3*2)/(2*4*3*2)
 one year ago

JOYALBest ResponseYou've already chosen the best response.0
how did you get that !!!
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.2
If the first digit is 5 then the last digit must be 0 If the first digit is 7 then the last digit can be either 0 or 5
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.2
Which gives No. of numbers divisible by 5 greater than 5000 = 1*1*3*2+1*2*3*2
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.2
And No. of numbers that can be formed greater than 5000= 2*4*3*2 as the first digit must be either 5 or 7
 one year ago

JOYALBest ResponseYou've already chosen the best response.0
yes.thanks.... can you answer 1 more question please?
 one year ago

sauravshakyaBest ResponseYou've already chosen the best response.2
Okay.... but post it seperately
 one year ago
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