Question

77
9:13 AM
Max. Marlis: 20
Mathematics Test, July 2020
Class: 11
Part A
1. The set of numbers which are the multiples of 5 is:
(A) a finite set (B) an infinite set (C) a singleton set (D) none of these.
2. Range of data: 20,40, 30, 60, 80, 100, 10,70 is:
ΠΑ)
10
100 (C) 90
(D) none of these
3. The nth term of an A.P. is given by a, = 3+4n. The common difference is :
(B)
(C)
(D) 1.
3
4
4. A set has 4 elements, then total nun ber of subsets is:
(6)
14
(C)
16
(D) none of these
5. Sum of series : 1+2+3+
+ n is
PA)
(1)
(8) n(n + 1)
In 1)(n+2)
2
(D) none of these
2
6. Coefficient of Varlation is
7. Roster form of the set [x x is an integer and -3 < x < 7) is
8. Geometric Mean between two positive real numbers a and bis
Part-B
9. If A=(1, 2, 3, 4) and B=(3,4,5,6,7) find (1) AUB (ii) ANB (1) A-B (iv) B-A
10. Which term of the A.P. 3, 8, 13, 18, is 78 ?
11. In a survey of 400 students in a school, 100 were listed as taking apple
Juice, 150 as taking orange juice and 75 were listed as taking both apple as well
as orange juice. Find how many students were taking neither apple juice nor
orange juice. OR
Find the sum of series: 7 + 77 + 777 +
To n terms
12. Find Mean deviation about mean for the following data:
10
X
FI
5
7
15
6
20
3
25
5
4​

Answer 1

Answer:

please follow up I have no answer