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The correlation coefficient, which measures the strength and direction of a linear relationship between two variables, ranges from -1 to +1. -1 indicates a perfect negative linear correlation, +1 indicates a perfect positive linear correlation, and 0 indicates no linear correlation. Values outside this range, such as -2 or +2, are not possible.
The ratio of the number of boys and girls in a school is 23:17. If 45% of the boys and 50% of the girls got passed out of 1600 students, the approximate...
A jar initially contains a certain quantity of buttermilk. After removing 8 liters of the mixture and replacing it with cream, this process is repeated ...
The average age of 19 girls is 45 years. If the age of one more girl is added the average decreases by half a year. What is the age of new girl?
A glass contains a certain quantity of vodka. After removing 8 liters of vodka and replacing it with lime, this process is repeated twice more—first, ...
On reducing the marked price of his goods by ₹28, a shopkeeper gains 20%. If the cost price of the article be ₹560 and it is sold at the marked pric...
A vessel is full of a mixture of kerosene and petrol in which there is 18% kerosene, 8 litre are drawn off and then the vessel is filled with petrol. Re...
In a jug, there is a mixture of apple and orange juice in the ratio of p:3. When 10 liters of Apple are added, the ratio of Apple to orange juice become...
In what ratio coffee at 315 Rs/kg should be mixed with the coffee at 355 Rs/kg so that after mixture its rate become 330 Rs/kg if the quantity of 1st ty...
Consider three numbers 'X', 'Y', and 'Z' that are in the ratio 18:25:30. If the value of 'X' and 'Z' is decreased by 12.5%, and t...
