Start learning 50% faster. Sign in now
Get Started with ixamBee
Start learning 50% faster. Sign in nowTotal number of ribbons = (x + 8) According to question; (xC1 × 5C1)/(x + 8)C2 = 3/11 2 × 5x/(x + 8)(x + 7) = 3/11 110x = 3 × (x2 + 15x + 56) 110x = 3x2 + 45x + 168 3x2 – 65x + 168 = 0 3x2 – 9x – 56x + 168 = 0 3x(x – 3) – 56(x – 3) = 0 (3x – 56)(x – 3) = 0 So, x = 56/3 or x = 3 Since number of ribbons can’t be in fraction Therefore, x = 3
A number N undergoes a two-step adjustment: first, it is increased by 20%, and then it is subsequently decreased by 10% of the new value. After these ad...
An officer ordered 3 computers of brand X and some computers of brand Y. The price of one computer of brand X was thrice that of brand Y. When the ord...
If the student scores 25% marks then he is failed by 150 marks. But if he scores 55% marks then he is passed with 180 marks. Find the passing percentage?
A man invested all his current month income in starting of a new business in which he spends 25% in advertisement 20% of remaining in furniture 10% of r...
20% of 35% of a number is 175. What is 18% of that number?
The income of Tina is Rs.26000 and she saves 30% of her income. The savings of Kajal is Rs.3000 more than that of Tina and she spends 60% of her income....
The radius of a circle is increased by 20%. Find the percentage increase in the area of the circle.
A shopkeeper sells apples. He sells x% of the stock each day and x/5% of the remaining apples gets spoiled overnight, then he sells the remaining apples...
Out of a total of 200 students in a class, 60% are boys and the rest are girls. Out of the total number of students who appeared in the class test, 25% ...