Recent questions tagged Class-12

0 votes

Q: Two balls are drawn at random With replacement from a box containing 10 black and 8 red balls.

Two balls are drawn at random With replacement from a box containing 10 black and 8 red balls. Find the ... and other is red Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: Probability of solving specific problem independently by A and B are

Probability of solving specific problem independently by A and B are 1 2 1 and 1 3 1 respectively. If both ... solves the problem. Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: One card is drawn at random from a well shuffled deck of 52 cards.

One card is drawn at random from a well shuffled deck of 52 cards. In which of the following cases are the events ... a queen or jack'. Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: In a hostel, 60% of the students read Hindi news paper, 40% read English news paper and 20%

In a hostel, 60% of the students read Hindi news paper, 40% read English news paper and 20% read both Hindi ... reads Hindi news paper. Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: The probability of obtaining an even prime number on each die, when a pair of dice is rolled is

The probability of obtaining an even prime number on each die, when a pair of dice is rolled is (A) 0 (B) 1 3 1 (C) 1 12 1 (D) 1 36 1 Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: Two events A and B will be independent, if (A) A and B are mutually exclusive (B) P (A’B’) = [1 – P(A)] [1 – P(B)]

Two events A and B will be independent, if (A) A and B are mutually exclusive (B) P (A'B') = [1 - P(A)] [1 - P ... D) P (A) + P (B) = 1 Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: An urn contains 5 red and 5 black balls. A ball is drawn at random,

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to ... second ball is red ? Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: A bag contains 4 red and 4 black balls , another bag contains 2 red and 6 black balls.

A bag contains 4 red and 4 black balls , another bag contains 2 red and 6 black balls. One of the two bags ... is drawn from the first Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: Of the students in a college, it is known that 60% reside in hostel and 40% are day scholars

Of the students in a college, it is known that 60% reside in hostel and 40% are day scholars (not residing in ... is a hostlier ? Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

0 votes

Q: In answering a question on a multiple r. choice test, a student either knows the answer or guesses.

In answering a question on a multiple r. choice test, a student either knows the answer or guesses. Let 3 ... answered it correctly ? Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance