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Ask CBSE Class 12 Science Mathematics question free ×

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# CBSE Class 12 Science Mathematics Free Doubts and Solutions

## There are N fish in a pond. A fisherman catches M of them, tags them and releases them back into the pond. If the fisherman catches 'r' tagged fish after K trials, what is the value of N?

Asked by bjayanta 18th August 2019, 8:14 PM

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## If the best and the worst paper never appear together, then six examination papers can be arranged in how many ways. This is question of permutations and combination

Asked by aks5685319 6th July 2019, 10:15 AM

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## 3 vector are vector a, vector b and vector c like as vector a + vector b + vector c=0; if mod vector a =1, mod vector b=4 and mod vector c=2 , then find out the expreation of mio( )=vector a dot vector b + vector b dot vector c + vector c dot vector a

Asked by broy31122002 19th June 2019, 10:21 PM

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## If y^x = e^(y-x) then prove dy/dx = (1+logy)^2/logy

Asked by ranaakshat345 17th June 2019, 1:28 PM

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## show without expanding ,=0

Asked by Shivendra 1st June 2019, 10:04 PM

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## examine the continuity of f(x) at x=0 if f(x) = sin2x/2x , x!=0 f(x) =2 , x=0

Asked by sarkangsawma 31st May 2019, 1:45 PM

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## What is the ans to this question??

Asked by tv2000in 28th May 2019, 12:02 AM

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## What is the ans to this question??

Asked by tv2000in 28th May 2019, 12:01 AM

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## What is the ans to this question??

Asked by tv2000in 28th May 2019, 12:01 AM

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## What is the ans to this question??

Asked by tv2000in 28th May 2019, 12:00 AM