Latest Elitmus Aptitude Question SOLUTION: There are 10 Letter and 10 correspondingly 10 different Address if the letter are put into envelope randomly then find the Probability that Exactly 9 letter will at the Correct Add

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(#M40034214) ELITMUS Numerical Ability question Probability Keep an EYE

There are 10 Letter and 10 correspondingly 10 different Address if the letter are put into envelope randomly then find the Probability that Exactly 9 letter will at the Correct Address??

Asked In Elitmus (10 years ago)

Unsolved Read Solution (10)

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Read Solution (10) :

anujnandwana  (10 years ago)

zero as 9 correct 1 wrong . its impossible to have 1 wrong so ans is zero

Is this solution Helpfull? Yes (58) | No (1)  

Geetanshu  (10 years ago)

1/10!....if 9 goes in correct places then the one left will automatically be at its right place...so only one case possible ie all goes to right places.

Is this solution Helpfull? Yes (5) | No (13)  

arpit jain  (10 years ago)

yes...anuj its zero..good keep it up

Is this solution Helpfull? Yes (4) | No (1)  

Punit mishra  (10 years ago)

ans is 0.
because if 9 letters are in correct address then the 10th letter will be automatically in correct address.

Is this solution Helpfull? Yes (1) | No (3)  

Rupesh  (9 years ago)

Zero
Since if 9 letter are crrosponding to their respective envelop the 10th one will always be in right envelop . so there is no event of EXACTLY 9 letter at correct address

Is this solution Helpfull? Yes (1) | No (2)  

AMIT KUMAR  (9 years ago)

correct answer is 0 bcz if 9 add is correct then 10th is automatically correct so,,answer is ZERO

Is this solution Helpfull? Yes (1) | No (1)  

manjeet kumar  (9 years ago)

@ all of you bro
how can you assume 9 are correct address while letter is put into randomely
hence
explain it properly.

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Geetanshu  (10 years ago)

Oh yes ANUJ...my bad...for 'exactly' 9 the probability is 0.

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pawan  (9 years ago)

ans: as we know we have 10 letter and 10 different address and one more information given that exactly 9 letter will at the correct address....so the remaining one letter automatically reach to their correct address
p(r):favorable outcomes /total outcomes
here favorable outcomes are 0......so probability is 0

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Priyanka dutta  (9 years ago)

Ans is 0. Bcoz when 9 letter are in correct address so automatically the 10 th will also go to the correct address

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