The probability of a red marble is 25/250 or 1/10. The probability of a green marble is 50/250 or 1/5. The probability of a blue or orange marble is 175/250 or 7/10. Multiply the numerators and the denominators to get 7/500 probability (B)
The perimeter of a rectangle is =2 (w+L)
let x and y be the two numbers respectively.
since there diff is 20 so
x-y=20....(1)
then they are in ratio 3:7 so
x/y=3/7
or x=3y/7....(2)
now putting the value of x in eqn (1) we get
3y/7-y=20
or 3y-7y=20×7
or -4y=140
or y=140/-4
y=-35
now keeping the value of y in eqn (2) we get
x=3×(-35)÷7
x=-15
therefore,the numbers are x=-15 and y=-35.
