A bag contains 3 red and 2 blue marbles. A marble is drawn at random. The probability of drawing a black ball is :
Answer: C
No answer description available for this question.
Enter details here
The probability of an event of a trial
Answer: C
The probability of any event will lie between 0 and 1, both included
Enter details here
Which of the following is not a condition of the binomial distribution?
Answer: C
No answer description available for this question.
Enter details here
From a set of 17 cards, numbered 1, 2, …. 17, one card is drawn. What is the probability that the number is a multiple of 3 or 7?
Answer: B
The total number of possible outcomes is 17
The number of favourable outcomes is 3, 6, 7, 9, 12, 14 and 15
= 7
Thus, the required probability = number of favourable outcomes/ total number of outcomes
= 7/17.
Enter details here
Three coins are tossed. What is the probability of getting at most two tails?
Answer: A
It is given that 3 coins are tossed simultaneously.
=>Total outcomes when one coin is tossed=2
=>Total outcomes when 3 coins are tossed= 2n = 2 X 2 X 2
=8 outcomes
Favourable outcomes: TTH, THT, HTT, THH, THT,HHT,HHH=7
Therefore, Probability= 7/8
Enter details here
What is the probability of getting a sum 9 from two throws of a dice?
Answer: C
No answer description available for this question.
Enter details here
Each of letters of the word PILOTS is on separate cards, face down on the table. If you pick a card at random, what is the probability that the letter will be a T or an L?
Answer: B
There are 6 outcomes out of which 2 are favourable (which are, getting T or L).
Probability of an event E, P (E) =number of favourable outcomes/ total number of outcomes
Required probability = 2/6 = 1/3.
Enter details here
Three unbiased coins are tossed. What is the probability of getting at most two heads?
Answer: D
No answer description available for this question.
Enter details here
What are the total outcomes when we throw three coins?
Answer: C
No answer description available for this question.
Enter details here
A class consists of 15 girls and 10 boys. Three students are to be randomly selected. Find the probability that one boy and two girls are picked.
Answer: C
No answer description available for this question.
Enter details here