A person tosses an unbiased coin. When head turns up, he gets Rs.8 and tail turns up he loses Rs.4. If 3 coins are tossed, what is probability that he gets a profit of Rs.12?
3/8
5/8
3/4
1/8
Person will get profit of Rs 12 only when there is 2H (Head) and 1T (Tail)
H + H + T = 12
8 + 8 + (-4) = 12
Total outcome of 2 head and 1 tail = 23 = 8
i.e (T, H, TH, HT, HH, HHT, HTH, THH)
Total event with 2H and 1 T is 3
therfore probability = 3/8
Quiz Recommendation System API Link - https://fresherbell-quiz-api.herokuapp.com/fresherbell_quiz_api
# | Quiz |
---|---|
1
Discuss
|
If four dice are thrown together, then what is the probability that the sum of the numbers appearing on them is 25 ?
Solution |
2
Discuss
|
Three unbiased coins are tossed. What is the probability of getting at most two heads ?
Solution |
3
Discuss
|
A teacher has to choose the maximum different groups of three students from a total of six students. Of these groups, in how many groups there will be included in a particular student?
Solution |
4
Discuss
|
What is the sum of all 4 digit numbers that can be formed by the digits 1, 2, 3, 4 each exactly once
Solution |
5
Discuss
|
If A, B and C are mutually exclusive and exhaustive events of a random experiment such that P(B)=3/2P(A) and P(C)=1/2P(B), then P(A∪C)=
Solution |
6
Discuss
|
In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?
Solution |
7
Discuss
|
How many integers between 1000 and 10000 have no digits other than 4, 5, or 6?
Solution |
8
Discuss
|
A polygon has 44 diagonals. What is the number of its sides?
Solution |
9
Discuss
|
In how many different ways can the letters of the word 'DETAIL' be arranged in such a way that the vowels occupy only the odd positions?
Solution |
10
Discuss
|
How many words, with or without meaning, can be formed using all letters of the word EQUATION using each letter exactly once?
Solution |
# | Quiz |
Copyright © 2020 Inovatik - All rights reserved