The probability that a marksman will hit a target is given is 1/5. Then the probability that at least once hit in 10 shots is a.`1-(4//5)^(10)` b. `1//5^(10)` c. `1-(1//5)^(10)` d. `(4//5)^(10)`

The probability that a student is not a swimmer is 1/5 . Then the probability that out of five students, four are swimmers is (A) ""^5C_4""(4/5)^4""1/5 (B) (4/5)^4""1/5 (C) ""^5C_1 1/5(4/5)^4"" (D) None of these

Probability that A speaks truth is 4/5 . A coin is tossed. A reports that a head appears. The probability that actually there was head is (A) 4/5 (B) 1/2 (C) 1/5 (D) 2/5

The probability that a bulb produced by a factory will fuse after 150 days if used is 0.05. what is the probability that out of 5 such bulbs none will fuse after 150 days of use? a. 1-(19/20)^5 b. (19/20)^5 c. (3/4)^5 d. 90(1/4)^5

n whole numbers are randomly chosen and multiplied. Now, match the following lists. {:(" List I"," List II"),("a. The probability that the last digit is 1, 3, 7, or 9 is","p. "(8^(n)-4^(n))/(10^(n))),("b. The probability that the last digit is 2, 4, 6, 8 is ","q. "(5^(n) - 4^(n))/(10^(n))),("c. The probability that the last digit is 5 is","r. " (4^(n))/(10^(n))),("d. The probability that the last digit is zero is","s. "(10^(n) - 8^(n) - 5^(n) + 4^(n))/(10^(n))):}

A fair die is thrown 20 times. The probability that on the 10th throw, the fourth six appears is a. "^20 C_(10)xx5^6//6^(20) b. 120xx5^7//6^(10) c. 84xx5^6//6^(10) d. none of these

The probability of hitting a target by three marksmen are 1/2, 1/3 and 1/4. Then find the probabi9lity that one and only one of them will hit the target when they fire simultaneously.

The probability that Mr. Q hits a target at any trial is 1/4 . Suppose he tries at the target 10 times. Find the probability that he hits the target (i) exactly 4 times (ii) at least one time.

Three of six vertices of a regular hexagon are chosen at random. The probability that the triangle with three vertices is equilateral is (a) 1/2 (b) 1/5 (c) 1/10 (d) 1/20