rahul played weel in this season . his current batting averagge is 50 . if he score 78 runs in today match . his batting average will become 54 . how many matches had he played in this season .
"50 x + 78 = 54 ( x + 1 ) = > 4 x = 24 = > x = 6 answer : d"
divide(subtract(78, 54), subtract(54, 50))