In a hostel 60% of the students read Hindi news paper, 40% read English news paper and 20% read both Hindi and English news papers. A student is selected at random. (a) Find the probability that she reads neither Hindi nor English news papers. (b
1 Answers
Talk Doctor Online in Bissoy App
The number of ways of distributing `3` identical physics books and `3` identical methematics books among three students such that each student gets at
Correct Answer - B `(b)` `n(A)=^(3+2-1)C_(2-1)xx^(3+2-1)C_(2-1)=16` `n(B)=n(C )=16` `n(AnnB)=^(3+2-1)C_(1-1)xx^(3+2-1)C_(1-1)` `=1=n(BnnC)=n(AnnC)` `n(AnnBnnC)=0` Required no. of ways `=100-(16+16+16-1-1-1+0)=55`
2 Answers 3 views
In a hostel, 160bulb, of resistance `1200Omega` eachar lighhted on a 220V supply every day from 6.P.M to 11.P.M. If the electrical energy costs 25pais
Correct Answer - Rs242
2 Answers 2 views
In a monthly test, 10 students were awarded marks in a Mathematics examination as follows: 23, 25, 15, 20, 17, 10, 24, 15, 19 If a student is selected
Correct Answer - `(1)/(10)`
2 Answers 1 views
The ratio of the number of students in schools X and Y is 4:7. if 15 students from Y join X, then the ratio becomes 1:1. What is the total number of s
Correct Answer - 110
2 Answers 2 views
The square of one-sixth of the number of students in a class are studying in the library and the remaining eight students are playing in the ground. W
Correct Answer - 12 or 24
2 Answers 5 views
(i) To issue an order for seizure of books and papers, ROC has to seek _________
(i) Special Court (ii) The Companies Act, 2013 (iii) Institute of Secretaries of India (ICSI) (iv) New Delhi (v) Market Intermediaries (vi) Raising a ticket
2 Answers 1 views
In a group of 25 students, 13 can speak English, 12 can speak Hindi and 6 speak neither. How many can speak (i) Both English and Hindi ? (ii) Only Hin
Correct Answer - (i) 6 , (ii) 6 , (iii) 13
2 Answers 2 views
In a class of 80 students, 55 students passed in mathematics and 60 passed in chemistry. 10 stu-dents failed in both mathematics and chemistry. (i) Ho
Correct Answer - (i) 45 , (ii) 25
2 Answers 1 views
`45%` of the student of a class participated in Physics Olympiad Math Olympiad. 4 students participated in both. Find how many students. (i) Are there
Correct Answer - (i) 40 , (ii) 18 , (iii) 36
2 Answers 2 views
The mean weight of 25 students of a class is 52 kg. if the mean weight of the first 13 student of the class is 48 kg and that of the last 13 students
Correct Answer - 39 kg
2 Answers 1 views