There will be two cases: Case I: 2 violet, 1 (grey or black) Probability = 4C2 × 8C1/ 12C3 = 12/55 Case II: all violet Probability = 4C3/12C3 = 1/55 Total probability = 12/55 + 1/55 = 13/55
In a Mall parking, there are some two wheelers and rest are four wheelers. If wheels are counted, there are total 120 wheels but according to the charge...
Two containers have mixtures of milk and water, respectively, in the ratio 1:4 and 7:4 in what ratio should the contents be mixed so that the ratio of m...
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...
Cost of two types of pulses is Rs.10 and Rs, 15 per kg, respectively. If both the pulses are mixed together in the ratio 2:3, then what should be the pr...
In what ratio coffee at 285 Rs/kg should be mixed with the coffee at 320 Rs/kg so that after mixture its rate become 300 Rs/kg if the quantity of 1st ty...
In a class, 60% of the students are boys, and the rest are girls. If 40% of the boys and 50% of the girls passed an exam, what percentage of the total s...
A shopkeeper has 68 kg rice a part of it, he sells at the profit of 44% and rest at loss of 24% and he get the loss of 16% so what is the quantity sold ...
A shopkeeper marked his goods 30% above the cost price and earned a profit of Rs. 14 after selling it by giving a discount of 22%. Find the cost price o...
A school conducted a survey on the number of students participating in various extracurricular activities over three years. The data is as follows (in n...
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, ...
