**A. 18/35**

B. 12/35

C. 17/35

D. 19/35

Explanation:

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If both agree stating the same fact, either both of them speak truth of both speak false.

Probability = 3/5 * 4/7 + 2/5 * 3/7

= 12/35 + 6/35 = 18/35

### Related Mcqs:

- The probability of a lottery ticket being a prized ticket is 0.2. When 4 tickets are purchased, the probability of winning a prize on at least one ticket is__________?
A. 0.4869

**B. 0.5904**

C. 0.6234

D. 0.5834 - Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is_____________?
A. 1/2

B. 16/19

C. 4/5

**D. 17/20** - If four coins are tossed, the probability of getting two heads and two tails is__________?
**A. 3/8**

B. 6/11

C. 2/5

D. 4/5 - Three 6 faced dice are thrown together. The probability that all the three show the same number on them is -.
A. 1/216

**B. 1/36**

C. 5/9

D. 5/12 - Three 6 faced dice are thrown together. The probability that no two dice show the same number on them is__________?
A. 7/12

**B. 5/9**

C. 1/36

D. 5/12 - A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are picked at random, what is the probability that they are all blue?
**A. 1/455**

B. 2/455

C. 1/91

D. 4/455 - A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is the probability that they are either blue or yellow?
A. 3/22

B. 4/21

**C. 2/21**

D. 1/14 - In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples?
**A. 5/21**

B. 5/14

C. 9/14

D. 16/21 - Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?
A. 1/6

B. 5/8

C. 3/8

**D. 5/6** - If a dice is rolled twice then what is the probability that the sum of the number of dots shown is 8?
**A. 5/36**

B. 4/36

C. 1/12

D. 1/2

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