average Model Questions & Answers, Practice Test for ibps clerk mains

Answer: (c)

16a + 16b = 672

or, 16 (a + b) = 672

∴ a + b = $672/16$ = 42

Required average = ${a + b}/2$

= $42/2$ = 21

Answer: (a)

Difference of marks

= 72 + 61 – 48 – 65 = 20

Correct average marks

= $68 + 20/20 = 68 + 1 = 69$

Answer: (c)

21a + 21b = 1134

or, 21 (a + b) = 1134

a + b = $1134/21$ = 54

∴ Required average = ${a + b}/2 = 54/2 = 27$

Answer: (e)

x + x + 2 + x + 4 + x + 6 = 4 × 36

⇒ 4x + 12 = 144

⇒ 4x = 144 – 12

⇒ 4x = 132

⇒ $x = 132/4 = 33$

Answer: (a)

Let the consecutive odd numbers be

x, x + 2, x + 4, x + 6 and x + 8

According to the question.

${x + x + 2 + x + 4 + x + 6 + x + 8}/5 = 41$

or, 5x + 20 = 41 × 5 = 205

or, 5x = 205 – 20 = 185

∴ $x = 185/5$ = 37

∴ A = 37 and E = 37 + 8 = 45

Required product = 37 × 45 = 1665