X100200300400Y302015
Which number fills the blank cell?
60
From the given table, we see that
200 x 30 = 300 x 20 = 400 x 15 = 6000 = constant
Hence, corresponding values of X and Y are inversely proportional.
If we consider the blank as y
100×y=200×30⇒100y=6000⇒y=60