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Selecting at least 3 black balls from a set of 6 black balls in total selection of 5 balls can be 3 black and 2 white balls 4 black and 1 white balls 5 black and 0 white balls Therefore, our solution expression looks 6C3 × 3C2 + 6C4 × 3C1 + 6C5 × 3C0 = 20 × 3 + 15 × 3 + 6 × 1 = 60 + 45 + 6 = 111 ways
The total monthly salary of Mamta and Rishi is Rs 1,10,000 and the ratio of the expenses of Mamta and Rishi is 7:6 and the ratio of savings of Rishi and...
Monthly income of Sneha is Rs. 32,000 and the ratio of her monthly expenditure to monthly savings is 4:4 respectively. If the average monthly savings of...
The income of Amit is Rs. 12,000 greater than Bhuvan's income. Amit spends 75% of his income, whereas Bhuvan's expenditure is 80% of Amit's expenditure....
799.99 + 1500.12 ÷ 29.98 × 50.01 = ? × 24.96
In the last financial year the ratio of the monthly incomes of Viraj and Rohan was m : n and the ratio of their monthly expenditures was p : n. In the c...
In which of the following years, the difference in no. of students appearing for UIT from the previous year is highest?
Arjun Spends 20% of his income to food, then spends 15% of the remaining amount on rent, followed by 25% of what remains on trave...
Vicky and Vinay have their monthly incomes in the ratio of 7:9. Their monthly expenditures are Rs. 6200 and Rs. 7800, respectivel...
What is the ratio of 'Anil's monthly savings to 'Jaggu's monthly savings if 'Anil' and 'Jaggu' have monthly Income's in a 5:6 ratio, and 'Anil's monthly...
The earnings of Akshat and Beena are in the ratio 7:9, respectively. Akshat utilizes 48% of his income and saves the remainder, while Beena spends Rs.2,...