# shruti290

## Forum Replies Created

Viewing 15 posts - 1 through 15 (of 19 total)
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• in reply to: probability #537

shruti290
Participant

i’m not sure but i think the answer is 50c2/100c2+50c2/100c2
how i got here is tht if u observe the pattern then u will notice tht if both m and n are odd or both m and n are even then 7^m+7^n will be divisible by 5 so there are 2 cases
case 1 when both m and n are odd
case 2 whn both are even
and the prbability will be case1 + case 2

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• in reply to: probability #559

shruti290
Participant

i think sahi hai because we are getting the right answer

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• in reply to: probability #557

shruti290
Participant

If order is imp and repetition is allowed theb total outcomes would bcome 100*100 and fav events 2*1250 and hence the ans becomes 1/4

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• in reply to: probability #556

shruti290
Participant

Total outcomes are 100c2

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• in reply to: permutation and combination #549

shruti290
Participant

I’m so sorry mh questions got interchanged in the reply ! I don’t know how to go abt for tht q2

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• in reply to: probability #545

shruti290
Participant

Rhoit I got tht but if u take the pattern tht I have taken in the correction it gets divisible by 5

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• in reply to: permutation and combination #544

shruti290
Participant

Rohit I got q2 but the 1st one i don’t know how to proceed.

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• in reply to: probability #541

shruti290
Participant

after making the correction i get is 98/4950
case 1 {(1,3) (3,5) (5,7) and so on} they make a total of 49 outcomes
case 2 {(2,4) (4,6) and so on} make a total of 49 outcomes

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• in reply to: probability #538

shruti290
Participant

sir by doing this i observed tht half the no of outcomes were there wehn no of heads>no of tails
so does the ans becomes 2^42?
nd what if it was 42 toses then we would have observed it for 2 ,4,6 etc no of tooses?

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• in reply to: permutation and combination #535

shruti290
Participant

but sir why did he take 0?

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• in reply to: permutation and combination #533

shruti290
Participant

how did u get 2^6

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• in reply to: probability #532

shruti290
Participant

But sir what i have done is tht first when i said tht we draw 10 balls frm 30 white and 30 blue balls so this sample will automatically include the case where either only 10 white balls are drwan or10 blue balls are drwan .so this does not becomes the case of exactly one color missing

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• in reply to: permutation and combination #524

shruti290
Participant

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• in reply to: probability #523

shruti290
Participant

my final answer aslo comes out to be the same. can anyone tell me what is my mistake?

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• in reply to: permutation and combination #518

shruti290
Participant

Why did u take o ?
And tell me one thing it says “the no of numbers” so shouldn’t we take the one digit two digit three and four digit no’s As well and since it says diff even do digits therefore we cannot exceed beyond four digits ?

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Viewing 15 posts - 1 through 15 (of 19 total)