Clara and Daniel started a commercial venture with investments in the ratio of 5 : 8 respectively. Four months later, Evan joined the business with an investment equal to twice the capital of Clara. At the end of one year, the total profit generated by the venture was Rs. 118000. What is the combined profit share of Daniel and Evan (in Rs.)?

The correct answer is 88000.

Step 1: Define the initial investments.
Let the initial investment of Clara be $5x$ and the initial investment of Daniel be $8x$.

Evan joined the business 4 months later with an investment equal to twice the capital of Clara.
Investment of Evan = $2\times 5x=10x$.

Step 2: Determine the investment duration for each partner over a 1-year (12-month) period.
Duration for Clara = 12 months
Duration for Daniel = 12 months
Duration for Evan = $12-4=8$ months

Step 3: Calculate the ratio of profit share.
The profit share is proportional to the product of investment amount and investment duration:

$\text{Clara}:\text{Daniel}:\text{Evan}=(5x\times 12):(8x\times 12):(10x\times 8)$

$\text{Ratio}=60x:96x:80x$

Dividing each term by $4x$ gives the simplified ratio:

$\text{Ratio}=15:24:20$

Step 4: Determine the profit per ratio unit.
Total ratio parts = $15+24+20=59$ parts.
Total profit generated = Rs. 118000.

Value of 1 ratio part = $\frac{118000}{59}=2000$

Step 5: Calculate the combined profit share of Daniel and Evan.
Combined ratio parts for Daniel and Evan = $24+20=44$ parts.

Combined profit share = $44\times 2000=88000$

Therefore, the combined profit share of Daniel and Evan is Rs. 88000.