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All posts related to Probability

Aniket Kumar
Shared from Probability - 1 on Jun 23, 2020 11:54 AM

Let Q, R and T be three events. If the probability of occurrence of exactly one of the events out of Q and R is 1 - y, out of R and T is 1 - 2y, out of T and Q is 1 - y, and that of occurrence of three events simultaneously is y2, then the probability (P) that at least one out of Q, R and T will occur is

 
greater than 1/2
is equal to 1/3
greater than or equal to 1/2
less than or equal to 1
Please type your answer before submitting.
Aniket Kumar

Why in q1 we used formula of P(Q U R) as P(Q) P(R)-2P(Q intersection R) instead of p(q) p(r)-p(q intersection r) ???

Pratyush Yadav
Shared from 16. Probability(11)_2024 on Aug 09, 2018 9:26 PM
Show common data

A bag contains 3 different white, 4 different black and 2 different red balls. Two balls are chosen at random. What is the probability that (a) one white and one red ball is chosen, (b) no white ball is chosen, (c) exactly one black ball is chosen?

 
1/6, 5/36, 4/9
5/6, 5/12, 5/9
1/6, 5/12, 5/9
None of these
Please type your answer before submitting.
Pratyush Yadav

My Answer and your solution matches then why it is incorrect?

Ketan Bansal
Shared from IIT JEE (Advanced) Mock - 1 (Pap... on May 13, 2018 8:20 AM

Directions: The following question has FOUR options, out of which ONLY ONE is correct.

Five positive integers are taken at random and are multiplied together. The probability that the product ends with an odd digit other than 5 and 7 is

 
Please type your answer before submitting.
Ketan Bansal

Determinants can't be added directly

Apporva Arya
Shared from MCA Mock - 1 on May 11, 2018 12:30 PM

The digits 1, 2, 3, 4, 5, 6, 7, 8 and 9 are written in a random order to form a nine-digit number. The probability that this number is divisible by 4 is

 
None of these
Please type your answer before submitting.
Apporva Arya

Total 2 digit pairs divisible by 4 must be 16( 92,96) must be included too

Anchal Juneja
Shared from Mock Test - 3 (Informatics Assis... on Apr 02, 2018 9:44 PM

How many meaningful words can be formed from the letters of the word 'AINTS', using each letter only once?

 
None
One
Two
Three
Please type your answer before submitting.
Manish Menaria

TANIS is also possible

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