JOIN ADRE 2.0 Telegram Group

NCERT Solutions for class 12 Maths | Chapter 13 - Probability

Questions
1 If the event A and B are independent, then P(A∩B) is equal to
A P(a) + P(b)
B P(a) – P(b)
C P(a). P(b)
D P(a) | P(b)

Answer:P(a). P(b)
2 If two events are independent, then
A they must be mutually exclusive
B the sum of their probabilities must be equal to 1
C (a) and (b) both are correct
D None of the above is correct

Answer:None of the above is correct
Advertisement
Article and Schedule Quiz Start Test!

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

3 If A and B are such that events that P(a) > 0 and P(b) ≠ 1, then P (A’|B’) equal
A 1 – P (A|B)
B 1 – P(A’|B)
C Class 12 Maths Chapter 13 Probability
D p(A’) | P(B’)

Answer:Class 12 Maths Chapter 13 Probability
4 You are given that A and B are two events such that P(b) = 3/5, P(A|B) = 1/2 and P (A∪B) = then P(B|A’) equals
A 1/5
B 3/10
C 1/2
D 3/5

Answer:3/5
5 If A and B are two events and A ≠ Φ, B ≠ Φ, then
A P (A|B) = P (a). P (b)
B
C P (A + B). P (B|A) = 1
D P (A|B) = P (a) | P (b)

Answer:
6 If P(a) = 4/5 and P(A∩B) = 7/10, then P(B/A) is equal
A 1/10
B 1/8
C 7/8
D 17/20

Answer:17/20
7 If A, B are two events associated with same random experiment such that P(a) = 0.4, P(b) = 0.8 and P(B/A) = 0.6 then P(A/B) is
A 0.3
B 0.4
C 0.5
D 0.6

Answer:0.3
8 Two dice are tossed once. The probability of getting an even number at the first dice ora total of 8 is
A 1/36
B 3/36
C 11/36
D 5/9

Answer:5/9
9 If P(b) = 1/5, P(A|B) = 1/2 and P(A∪B) = 4/5 then P (A∪B)’ + P (A’∪B) =
A 1/5
B 4/5
C 1/2
D 3/5

Answer:3/5
10 A and B are events such that P(a) = 0.4, P(b) = 0.3 and P(A∪B) = 0.5. Then P(B∩A) equals
A 2/3
B 1/2
C 3/10
D 1/5

Answer:1/5
11 If P(A∩B) = 7/10 and P(b) = 17/20, then P(A|B) equals
A 14/17
B 17/20
C 7/8
D 1/8

Answer:14/17
12 An experiment has 10 equally likely outcomes. Let A and B be two non-empty events of the experiment. A consists 4 outcomes, the number of outcomes that B must have so that A and B are independent is
A 2, 4 or 8
B 36 or 9
C 4 or 8
D 5 or 10

Answer:5 or 10
13 You are given that A and B are two events such that P(b) = 3/5, P(A|B) = 1/2 and P (A∪B) = 4/5, then P(a) equals
A 3/10
B 1/5
C 1/2
D 3/5

Answer:1/2
14 A pair of dice are rolled. The probability of obtaining an even prime number on each dice is
A 1/36
B 1/12
C 1/6
D 0

Answer:1/36
15 The probability that A speaks truth is 4/5 while this probability for B is 3/4. The probability that they contradict each others when asked to speak ana fact is
A 7/20
B 1/5
C 3/20
D 4/5

Answer:4/5
16 If P(a) = 2/5, P(b) = 3/10 and P (A∩B) = 1/5, then P (A’|B’). P(B’|A’) is equal to
A 5/6
B 5/7
C 25/42
D 1

Answer:25/42
17 If A and B are two independent events with P(a) = 3/5 and P (b) = 4/9, then P (A’∩B’) equals
A 4/15
B 8/15
C 1/3
D 2/9

Answer:2/9
18 Let P (a) = 7/13, P(b) = 9/13 and P (A∪B) = 9/13, Then P(A’|B) is equal to
A 6/13
B 4/13
C 4/9
D 5/9

Answer:5/9
19 If A and B are any two events such that P(a) + P(b) – P(A∩B) = P(a) then
A
B
C
D

Answer:
20 If A and B are two events such that P(a) ≠ 0 and Class 12 Maths Chapter 13 Probability 1 then
A
B
C
D

Answer:

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!

Chapters

Advertisement
Assam Direct Recruitment Test Series