Question

please solve this question

Answer 1

total gain =600
gain per cent =600/250=2.4

Answer 2

Hey there!

C.P = 250 × 8 = Rs.2000

Total S.P { (1) + (2) }

70% of 250 packets

$\frac{250}{100} \times 70$

= 175 packets.

175 × Rs.11 = Rs.1925 ------(1)

30% (remaining) of 250 packets

$\frac{250}{100} \times 30$

= 75 packets

75 × Rs.9 = Rs.675 -----(2)

Total S.P = (1) + (2)

= Rs.1925 + Rs.675
= Rs.2600

Gain = S.P - C.P

= Rs.2600 - Rs.2000
= Rs.600

Gain %

$\: = \frac{(gain \times 100)}{cp}$

$\frac{600 \times 100}{2000}$

= 30% is the gain per cent!

Glad if helped :)