Find the sum of the expression
Solution: Given: All the 2-digit numbers To find: Probability of selecting a number at random not divisible by 7 Analysis: Total number of 2-digit numbers 10, 11, …….., 99 → 90 numbers Unfavourable numbers i.e. numbers divisible b 7 : 14, 21, ………, 98 Number of unfavourable numbers = 13 This can be hand counted or we can use the following properties : Last term = First time + (no. – 1) Diff 98 = 14 + (no. - 1) 7 ⇒ no. = 13 ⇒ Probability Hence, the solutions is D
After several defeats in wars, Robert Bruce went in exile and wanted to commit suicide. Just before committing suicide, he came across a spider attempting tirelessly to have its net. Time and again, the spider failed but that did not deter it to refrain from making attempts. Such attempts by the spider made Bruce curious. Thus, Bruce started observing the near-impossible goal of the spider to have the net. Ultimately, the spider succeeded in having its net despite several failures. Such act of the spider encouraged Bruce not to commit suicide. And then, Bruce went back again and won many a battle, and the rest is history. Which one of the following assertions is best supported by the above information?
Solution: Options (B) and (C) can be clearly discarded, since honesty and adventure-making have no relationship with the given argument. Option A. may appear close. But remember, every failure may not result into success, as it happens in the case of spider. So, the correct answer is option D. .
Suppose the total distance travelled by the tourist = x km Thus the time taken during journey through train = Time taken during journey through bus= Time taken during journey through cycle = The average speed of the tourist during his entire journey =
If the labour wages per day increase by 1/5 of the current wages, new labour wages will be (1+1/5) = If the working hours decrease by 1/24 of the current period, new working period = Now the new cost of erection =
The cost function for a product in a firm is given by 5q2, where q is the amount of production. The firm can sell the product at a market price of ₹ 50 per unit. The number of units to be produced by the firm such that the profit is maximized is
P = 50q – 5q2 p is maximum at 50 – 10q = 0 or, q = 5 Else check with options.
The correct answer is 'Setbacks'.
Very little is used instead of very less. Correct sentence for option D: This country's expenditure on educational reforms is very little.