Directions: Refer the following data to answer the questions given below.
In 20 kg fresh grapes, 18 kg is water and 2 kg is dried grapes. But these must contain 20% of water of total weight.
Hence 2/0.8 = 2.5 kg.
Directions: Refer the following data to answer the questions given below.
Let the quantities of the paints A and B in the mixture sold be a litres and b litres respectively. Value at which the entire mixture is sold=264 Profit percent made=10% 100
Price at which the entire mixture is bought=24 per litre Let the cost of B be x per litre. Cost of A=(x+8)per litre
( x? 8)a?xb?24
10
Maximum cost of B will occur when a is minimum. b<=a. So, minimum a is 5. Corresponding b is 5. Then (x+8)(5)+x(5)=240 x=20
Directions: Refer the following data to answer the questions given below.
Let the average age of people aged 51 years and above be x years.
Let the average age of people aged below 51 years be y years.
Let the number of people aged below 51 years be N.
Given, the average age of all the people in the apartment complex is 38 years.
Therefore,
x?30?y?N? 38 ….(1)
30?N
We want to maximize y, which occurs when x is minimum i.e. for x=51.
Substituting the value of x in (1) we get
390=N×(38-y)
Again, when y is maximum, N is also maximum i.e. 39
Therefore maximum value of y = 28.
Directions: Refer the following data to answer the questions given below.
