Jamb Mathematics 2019 Past Questions and Answers

Question 76:

• JAMB 2019

Marks	1	2	3	4	5
Frequency	2y - 2	y - 1	3y - 4	3 - y	6 - 2y

The table above is the distribution of data with mean equals to 3. Find the value of y.

A. 5
B. 2
C. 3
D. 6

Question 77:

• JAMB 2019

Evaluate \(\frac{2\sin 30 + 5\tan 60}{\sin 60}\), leaving your answer in surd form.

A. \(\frac{2\sqrt{3}}{3} + 10\)
B. \(\frac{3\sqrt{2} - 1}{5}\)
C. \(\frac{3\sqrt{2} + 1}{5}\)
D. \(\frac{2\sqrt{3}}{3} - 10\)

Question 78:

• JAMB 2019

In the circle above, with centre O and radius 7 cm. Find the length of the arc AB, when < AOB = 57°.

A. 5.32 cm
B. 4.39 cm
C. 7.33 cm
D. 6.97 cm

Question 79:

• JAMB 2019

Calculate the volume of the regular three dimensional figure drawn above, where < ABC = 90° (a right- angled triangle).

A. 394 cm\(^3\)
B. 425 cm\(^3\)
C. 268 cm\(^3\)
D. 540 cm\(^3\)

Question 80:

• JAMB 2019

The histogram above represents the number of candidates who did Further Mathematics examination in a school. How many candidates scored more than 40?

A. 100
B. 79
C. 150
D. 90