Question

Q.7) The value of X is 120% of Y. And the value
Y is 20% less than the value of Z, then the value
of the difference between the X and Z is 70. Find the value of X + Y + Z.
a) 4710
b) 4830
c) 4650
d) 4920
e) 4540

Answer 1

Answer:

4920 as per my calculation...

Answer 2

The correct option is b) 4830.

Step-by-step explanation:

Consider the provided information.

The value of X is 120% of Y.

$X=1.2Y$

The value  Y is 20% less than the value of Z.

$Y=Z-0.2Z\\Y=0.8Z$

The difference between the X and Z is 70.

$Z-X=70$

Substitute $X=1.2Y$ in $Z-X=70$

$Z-1.2Y=70$

Now substitute $Y=0.8Z$ in above equation.

$Z-1.2(0.8Z)=70$

$Z-0.96Z=70$

$0.04Z=70$

$Z=1750$

Substitute the value of Z in $Y=0.8Z$

tex]Y=0.8(1750)=1400[/tex]

Now substitute the value of Y in $X=1.2Y$

$X=1.2(1400)=1680$

The sum of X+Y+Z = 1680+1400+1750 = 4830

Hence, the value of X + Y + Z is 4830.

Therefore, the correct option is b) 4830.

#Learn more

brainly.in/question/9962803

Solve it by substituting method​