Jamb Mathematics 2015 Past Questions and Answers

Question 26:

• JAMB 2015

One bag contain 3 blue and 5 red balls, another bag contain 2 blue and 4 red balls respectively. One ball is drawn for each bag. What is the probability both balls are blue

A. \( \frac{2}{15} \)
B. \( \frac{3}{24} \)
C. \( \frac{3}{21} \)
D. \( \frac{3}{28} \)

Question 27:

• JAMB 2015

Given that A = {3, 4, 1, 10, 1/3 }
B = {4, 3 1/3, 1/3, 7}.
Find A∩B

A. {}
B. {1/3, 1, 2}
C. {3, 4, 1/3}
D. {1, 3, 1/3}

Question 28:

• JAMB 2015

Find x if 132_x = 70 _eight.

A. 5
B. 3
C. 6
D. 1

Question 29:

• JAMB 2015

A man sells his new brand car for N420,000 at a gain of 15%. What did it cost him?

A. N410,000
B. N365, 217
C. N157, 250
D. N257,000

Question 30:

• JAMB 2015

Find the value of x if \( [ 1 ÷ 64^{(x + 2)}]= [4^{(x − 3)} ÷ 16^x ] \)

A. \( \frac{3}{2} \)
B. \( \frac{2}{3} \)
C. \( \frac{1}{3} \)
D. \( -\frac{3}{2} \)