The table shows numbers with the ratio x : y? find the missing number?
x 1 15 225
y 4 ? 900

The value of missing number is:

60

Step-by-step explanation:

The ratio x:y is given below

x:y=1:4

x:y=15:?

x:y=225:900

The ratio x:y will remain same for every x and y

Hence, 1:4=15:?

Let a=?

a=60

Hence, the value of missing number is:

60

for b its (t) and c its (d)

step-by-step explanation:

option: d is correct

step-by-step explanation: