Question

please tell fast I will mark brainliest​

Answer 1

Answer:

195 buttons

Step-by-step explanation:

First, lets find the lcm of 3 and 5,

This is 15.

Now lets see the profit of Anu from this.

She purchased 5 sets of 3, so she spent 25 rupees. She sold 3 sets of 5, so she made 36 rupees. Her profit for these 15 buttons is 11 rupees. Now we have to keep buying 15 more buttons each time to get 143. Multiplication is repeated addition, so 11 times what is 143? 11 times 13 is 143. That means we had to get 13 times 15 buttons to get 143 rupees profit. 13*15 is 195.

Hope it helps.

Answer 2

Total 195 buttons purchases/sold  if Purchased button at 3 for Rs 5 and Sold buttons at 5 for Rs 12 and total profit was Rs 143.

Given:

• Purchased button at 3 for Rs 5
• Sold buttons at 5 for Rs 12
• Total Gain is Rs 143

To Find:

• How many buttons purchased/sold

Solution:

Step 1:

Assume That 15x  button purchased and sold

(Note 15 is the LCM of 3 and 5)

Step 2:

Calculate Purchase price for 15x buttons

3 button purchased for  = Rs 5

1 button purchased for  = Rs 5/3

15x button purchased for  = Rs 15x * 5/3   = Rs 25x

Step 3:

Calculate Selling price for 15x buttons

5 button sold for  = Rs 12

1 button sold for  = Rs 12/5

15x button sold for  = Rs 15x * 12/5   = Rs 36x

Step 4:

Find Profit = Selling Price - Purchase Price for 15x buttons

36x - 25x = 11x  Rs

Step 5:

Equate profit 11x with 143 and solve for x

11x = 143

=> x = 13

Step 6:

Substitute x = 13 and calculate value of 15x

15x = 15(13) = 195

Hence, Total 195 buttons purchases/sold