The teacher has to take 10 questions at a time from 12 questions.

Total ways = 12C10 = 12!/(10!)(12-10)! = 12 x 11 / 2 = 66

The teacher can make 66 different exams

8 0

2 years ago

Read 2 more answers

0.2) Sharad bought one quintal of onions for Rs 2000. Later he

dalvyx [7]

Answer: Loss, 200 Rs

Step-by-step explanation:

Given

Sharad bought a quintal of onion i.e. $1000\ kg$ for $Rs.\ 2000$

So, the cost price of onion is

$\Rightarrow \dfrac{2000}{100}=20\ \text{Rs per kg}$

He sells it at $18\ \text{Rs. per kg}$

Here, the Selling price is less than the cost price

So, he incurs a loss of $2\ \text{Rs per kg}$

For a quintal it is

$\Rightarrow 2\times 100=200\ \text{Rs}$

$\Rightarrow \text{Loss }\ \%=\dfrac{C.P.-S.P.}{C.P.}\times 100\\\\\Rightarrow \text{Loss }\ \%=\dfrac{20-18}{20}\times 100=10\%$

6 0

3 years ago