If –2 is the solution of the equation 2x + 1 – 3c = 2c + 3x – 7, find the value of c.
The time taken to do a piece of work is inversely proportional to the number of men employed. If it takes 45 men to do a piece of work in 5 days, how long will it take 25 men?
The probability of a student passing any examination is 32 . If the student takes three examinations, what is the probability that he will not pass any of them?
Find the mean of the data 7, -3, 4, -2, 5, -9, 4, 8, -6, 12
If the 9th term of an A.P. is five times the 5th term, find the relationship between a and d.
The mean of a set of six numbers is 60. If the mean of the first five is 50, find the sixth number in the set.
The range of the data k + 2, k – 3, k + 4, k –2, k, k – 5, k + 3, k – 1 and k + 6 is
A trader bought goats for N4,000 each. He sold them for N180,000 at a loss of 25%. How many goats did he buy?
Simplify 52.4 – 5.7 – 3.45 – 1.75
A cylindrical tank has a capacity of 3080m3. What is the depth of the tank if the diameter of its base is 14m?