The average mark obtained by the first four students in a row of 5 students is 155 and that out of the last four is 215.If the first student obtained 140 marks,then what is the average marks obtained by the first and last students in the row?
Answers
Answered by
3
First 4 average = 155
so total marks of first 4 = 155*4 = 620
last 4 average = 215
total marks of last 4 = 215*4 = 860
last 4 - first 4 marks = 860 - 620 = 240
first and last student marks = 240 and their average is 240/2 = 120
SrV12:
srry,first one is 234
then the answer is 240
ohk
as you can see the total marks of first and last student is 240
but you wrote you want average so i have calculated the average
otherwise 240 is the answer
i don't know what is correct,because question is correct and options too
confusion
dont you have answer key?
nah.thats why im questioning here
Similar questions