Let the correlation coefficient between X and Y be 0.6. Random variables Z and W are defined as Z=X+5 and W=Y/3. What is the correlation coefficient between Z and W?
After increase in the price of coffee by 15%, a person is able to buy 3 kg less for Rs. 1,840. Find the original and increased price of the coffee per kg?
In a lock-making factory, 10 percent of the total produced locks were found to be defective, and 80 percent of the non-defective locks were exported. ...
Out of 700 people in a club, 15% speak Russian and the rest speak Ukrainian. If out of non-Russian speakers, 60% are males and out of Russian speakers 8...
A scored 35% marks and failed by 40 marks whereas B scored 55% marks, which was 80 more than the passing marks of the examination. Find the total marks ...
Monthly savings of ‘A’ is Rs. 1000 more than his monthly expenditure and his total monthly income is Rs. 8200. If his monthly income is increased by...
A and B together have total of Rs.4200 out of which they donated 10% to the orphanage school. The remaining amount is to be then redistributed between t...
The only expenses of Arun are on grocery, rent and fun expenses. Arun spent Rs. 5,250 on fun, amount spent by him on rent is Rs. 9,000 more than that on...
Rohit spent (R-4)% of his monthly income on food. Out of the remaining (R+7)% was spent on travelling. (1/6) of the remaining was spent on education. (2...
In a company, 45% of the workforce consists of females. The number of male employees exceeds that of females by 350. What is the equivalent of 40% of th...
Calculate the % change in Anuradha's monthly expenditure when her income experiences a 32% increase, while her monthly savings, which normally accounts ...
