x=3^n where n is positive integer then what is the probability of x will have 3 at unit place???
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Answered by
3
easy, 3^1=3
3^2=9
3^3=27
3^4=81
3^5=243
3^6=729
etc etc etcetc
so total number can be filled at unit place are 9,7,1,3
so total probability is 4
and favorable is 1
so probability is 1/4
3^2=9
3^3=27
3^4=81
3^5=243
3^6=729
etc etc etcetc
so total number can be filled at unit place are 9,7,1,3
so total probability is 4
and favorable is 1
so probability is 1/4
It is too premature to decide that 9,7,1,3 would only only at unit place.
An IIT level you say? Forget it man. This wouldn't even touch the Mains.
I'm talking about the new system. The one that contains mains and advanced.
Answered by
0
For n=1 we have 3 in unit place
n=2 we have 9 at unit place
n=3 we have 7at unitplace
n=4 we have 1 at unitplace
n=2 we have 3 at unit place similarly it can be seen that only 3,9,7,1 appear at unit place
In other words there are 4 possible outcomes and probabilityof 3 appearing is is 1/4.
n=2 we have 9 at unit place
n=3 we have 7at unitplace
n=4 we have 1 at unitplace
n=2 we have 3 at unit place similarly it can be seen that only 3,9,7,1 appear at unit place
In other words there are 4 possible outcomes and probabilityof 3 appearing is is 1/4.
improper answer
wrong method ..........
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