Question 31In how many ways can 2 students be selected from a group of 5 students in a debating competition?A. 25 ways B. 20 ways C. 15 ways D. 10 ways Objective Show full explanation
Question 32The graph below shows the cumulative frequency curve of the distribution of marks in a class est. What percentage of the students scored more than 20? A. 8%B. 68%C. 28%D. 17%Objective Show full explanation
Question 33Find the mean deviation of 1,2,3 and 4 A. 2.0B. 2.5C. 1.5D. 1.0Objective Show full explanation
Question 34Find the value of x in the figure below A. 5√6B. 3√6C. 20√6D. 15√6Objective Show full explanation
Question 35Find the value of α2 + β2 if α + β = 2 and the distance between the points (1,α) and (β,1) is 3 units.A. 14B. 11C. 3D. 5Objective Show full explanation
Question 36Find the remainder when 3x3 + 5x2 - 11x + 4 is divided by x + 3 A. 1B. -4C. 4D. -1Objective Show full explanation
Question 37Given that the first and fourth terms of a G.P are 6 and 162 respectively, find the sum of the first three terms of the progression A. 48B. 78C. 27D. 8Objective Show full explanation
Question 38Factorize completely ac - 2bc - a2 + 4b2A. (a - 2b)(c- a + 2b)B. (a - 2b)(c + a + 2b)C. (a - 2b)(c + a -2b)D. (a - 2b)(c - a - 2b)Objective Show full explanation
Question 39The length L of a simple pendulum varies directly as the square of its period T. If a pendulum with period 4s is 64m long, find the length of a pendulum with period 9sA. 96cmB. 36cmC. 324cmD. 144cmObjective Show full explanation
Question 40What is the rate of change of volume, v, of a hemisphere with respect to its radius, r, when r = 2? A. 4πB. 8πC. 16πD. 2πObjective Show full explanation