Q.1 (a) In a game show, the contestant is shown 10 boxes, 3 of which contain prizes. If a contestant is allowed to select any three boxes then what is the probability that
i) The contestant wins all the three prizes.
ii) Only one selected box contains prize.
(b) Explain the rolling of a fair die and then flipping of a fair coin with the help of tree diagram.
Suppose You have eight televisions. Three are defective. If teo are randomly selected, compute the probability that both televisions work. What is the probability that at least one of the two does not work?
Peter picked 4 positive integers a,b,c and d. He wanted to determine the polynomial f(x)= (1−x)^(a+b+c+d)(1+x)^(a+b+c)(1−x+x2)^(a+b)(1+x+x2)^a. He felt lazy and ignored any term that involved x taken to a power larger than 4. He was surprised to see that the result was the term . What is the value of ?
How many permutations σ of the set {1,2,…,15} are there such that σ(1)=1,|σ(n)−σ(n−1)|≤2 for 2≤n≤15?
Note: σ(n) denotes the nth position of the permutation.
There are 20 people on the board of directors of a publicly listed company. Each pair of people are either friends or enemies with each other. Every person has exactly 6 enemies on the board. If every group of 3 directors form a committee, what is the total number of committees that are formed by all friends or all enemies?
My garage door opener has a 12 switch DIP switch which is set to match an identical DIP switch in the remote and thereby provide some level of security. Each switch on the DIP switch can be either ON or Off. How do you calculate the total possible number of switch combinations?
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
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