Answer: Leo is 24 years old,
Step-by-step explanation:
Let 'x' denotes the age of Mark.
Given , Leo is three times older than Mark.
i.e. Expression for Leo's age =
Since , sum of their age is 32, then
Now , divide both sides by 4 to get the value of x.
Thus , Age of Mark = 8 years
Age of Leo = 3 (8) = 24 years
Therefore , Leo is 24 years old.
Answer:
5 more games to be won for the 50% success rate.
Step-by-step explanation:
Total number games played = 500
Number of successful games = 49% of 500
= 500 ×
= 245
Number of successful games for the success of 50% = 500 ×
= 250
Therefore, number of game you have to win more = 250 - 245
= 5 games
We are going to do this step by step:
Let's start with option A
A.
X = 25 and Y = 5/2
In this case, when X = 25 , then Y = 10 ,which is different to 5/2
B.
X = 14 , Y = 35
In case, when X = 14, then Y = 28/5, which is different to 35
C.
X = 40 , Y = 24
Similarly, in this case, when X = 40, then Y = 16, which is different to 24
D.
X = 10 , Y=4
Now, in this case, we can see that when X = 10, then Y = 4 which is the same as the given value of Y
E.
X = 50 , Y = 20
In this case, the values of Y are also the same.
F.
X = 30 , Y = 12
Again, in this case, the values of Y are the same, so the pair satisfies the equation.
In conclusion: options D, E and F satisfy the equation