Calculate the mean deviation of the set of numbers  7, 3, 14, 9, 7, and 8 

The mean of a set six number is 60. If the mean of the first five is 50. Find the sixth number in the set. 

How many three – digit number can be formed from 32564 without any digit being repeated?

The acre for rice, pineapple, cassava, cocoa and palm oil in a certain district are given respectively as 2, 5,  3, 11 and 9. What is the angle of the sector for cassava in a pie chart 

The probability of a students passing any examination is $\tfrac{2}{3}$. If the student takes three examination. What is the probability that he will not pass any of them

The range of the data k + 2, k – 3, k + 4, k – 2, k, k – 5, k + 3, k – 1 and k + 6

The venn diagram below shows the number of students offering Music and History in a class. What is the probability that he offers Music only

Find  the mean of the data  7,  –3, 4, –2, 5, –9, 4, 8, –6, 12, 

The locus of a point P which is equidistant from two given point S and T is