In the above question, if the rate of ticket for a child (considered to be unmarried and below 18 years) is Rs. 6, while the price of a ticket for an adult (i.e., married and above 18) is Rs. 10. So what is the minimum price has to pay for the tickets?

Options

A. a. Rs. 52
B. b. Rs. 58
C. c. Rs. 90
D. d. data insufficient

Answer

To find the minimum price for the tickets for Martin's family, we need to determine how many children and adults are in the family and then calculate the total cost based on the ticket prices.

### Step-by-Step Solution:

1. **Identify the Family Members**:
- According to the problem, the family consists of:
- 1 grandfather
- 1 grandmother
- 2 fathers
- 2 mothers
- 3 children (including Martin)
- This gives us a total of 6 family members.

2. **Classify Family Members**:
- **Adults**:
- Grandfather
- Grandmother
- 2 Fathers
- 2 Mothers
- **Children**:
- Martin
- His sister
- Total Adults = 4 (Grandfather, Grandmother, 2 Fathers)
- Total Children = 2 (Martin and his sister)

3. **Determine Ticket Prices**:
- Price for a child ticket = Rs. 6
- Price for an adult ticket = Rs. 10

4. **Calculate Total Ticket Cost**:
- Total cost for adults:
\[ \text{Total Adult Cost} = \text{Number of Adults} \times \text{Price per Adult Ticket} = 4 \times 10 = 40 \text{ Rs.} \]
- Total cost for children:
\[ \text{Total Child Cost} = \text{Number of Children} \times \text{Price per Child Ticket} = 2 \times 6 = 12 \text{ Rs.} \]
- Total cost for all tickets:
\[ \text{Total Cost} = \text{Total Adult Cost} + \text{Total Child Cost} = 40 + 12 = 52 \text{ Rs.} \]

5. **Final Answer**:
- The minimum price that has to be paid for the tickets is **Rs. 52**.