27
30
33
90
Correct answer is B
Prime numbers between 1 and 6 are 2, 3 and 5 x = 2 + 3 = 5 = 10 H.C.F. of 6, 9, 15 = 3 ∴ y = 3 X x y = 10 x 3 = 30
1,3
1, 2
3, 3
0, 2
Correct answer is B
From the distribution, Mode = 1 and
Median = \(\frac{2 + 2}{2}\)
= 2
= 1, 2
18
15
10
5
Correct answer is D
No of students offering Physics are \(\frac{12}{360}\) x 150
= 5
Find correct to one decimal place, 0.24633 \(\div\) 0.0306
0.8
1.8
8.0
8.1
Correct answer is D
\(\frac{0.24633}{0.03060}\) multiplying throughout by 100,000
= \(\frac{24633}{3060}\)
= 8.05
= 8.1
182
91
63
28
Correct answer is B
\(T_{n} = ar^{n - 1}\) (nth term of a G.P)
\(T_{4} = ar^{3} = 189\)
\(7 \times r^{3} = 189 \implies r^{3} = 27\)
\(r = \sqrt[3]{27} = 3\)
\(S_{n} = \frac{a(r^{n} - 1)}{r - 1}\)
\(S_{3} = \frac{7(3^{3} - 1)}{3 - 1} \)
= \(\frac{7 \times 26}{2} = 91\)