Question

Following marks were obtained by 12 students in a mathematics test (out of 50): 46,33,21,17,49,10,31,37,18,35,41,8.(a)what is the range of marks?(b)Find the mean.(c)If the marks of the student who scored only 8 marks are increased to 10, find the new mean

Answer 1

Answer:

range=41

mean=28.833333333

new mean=29.6666666667

Step-by-step explanation:

range=higest observation-lowest observation

         =49-8

         =41

mean=average

        =46+33+21+17+49+10+31+37+18+35+41+8/12

        =28.833333333

new mean=46+33+21+17+49+10+31+37+18+35+41+(8+10)/12

                =29.6666666667