The average marks scored by F1 and F2 is 40 more than the average marks scored by F2 and F3. If the marks scored by F3 is 90, then what is the marks obtained by F1 ?

130 140 160 170

170

According to question , ( F1 + F2 ) - ( F2 + F3 )  = 80 F1 - F3 = 80 F3 = 90 F1 - 90 = 80 F1 = 170 So , Value of F1 is 170