Question
Twenty five liters of 60% concentration of acid solution
is added to 35 liters of 80% concentration of acid solution. What is the concentration of acid in the new solution? (correct to one decimal places)Solution
Quantity of acid in 25 litres mixture = 25 × 60/100 = 15 Quantity of acid in 35 litres mixture = 35 × (80/100) = 28 Total quanity of acid = 28 + 15 = 43 litres Total quanitiy of mixtre = 35 + 25 = 60 Percentage of acid in 60 litres mixture = 43/60 × 100 = 71.67% ≈ 71.7%
Let x and y be two variables with variance as 1990 and 796 with 11 and 9 number of observations respectively. The value of F(10, 8) at 5% level of sign...
The value of k so that following is probability mass function
X:           -2           -1           0  �...
For completely randomized design for k treatments and n observations, yif = response from the jth unit receiving ith treatment, �...
A dice was thrown 400 times and 'six' resulted 80 times. The data is used to justify the hypothesis of an unbiased dice at 95% confidence. With referen...
If Z1, Z2,…Zn are n independent standard normal variates, then Σni=1 Z2i will follow:
The mode (correct to two decimal places) for the given data is:
Which option is incorrect for the component of ti.me series.
 X and Y are independent normal variables with mean 50 and 80 respectively and standard deviation as 4 and 3 respectively. What is the distribution o...
Relevant for Exams:
