Question

39. The ratio of number of 10 rupee notes to 20 rupee
notes in a purse is 3: 4. If there are total 84 notes
in the purse, then how much money is there in the
purse?
A. 1320
B. 1230
c. 1100
D. 1260
​

Answer 1

AnswEr :

• Ratio of Rs.10 Notes to Rs. 20 Notes is 3 : 4
• Total Number of Notes in Purse is 84, then find Total Money.

Let the Rs.10 Notes be 3x and Rs. 20 Notes be 4x and total of them are 84.

• According to the Question Now :

⇝ Rs. 10 Notes + Rs. 20 Notes = 84

⇝ 3x + 4x = 84

⇝ 7x = 84

• Dividing Both term by 7

⇝ x = 12

◗ Rs.10 Notes = 3x = (3 × 12) = 36

◗ Rs. 20 Notes = 4x = (4 × 12) = 48

_________________________________

• Now we calculate Total Money in Purse :

⇒ Total Money in the Purse

⇒ (Rs.10 Notes × 10) + (Rs.20 Notes × 20)

⇒ (36 × 10) + (48 × 20)

⇒ Rs. 360 + Rs. 960

⇒ Rs. 1320

∴ Hence, Correct Option is [ A.] Rs. 1320

Answer 2

Answer:

Step-by-step explanation:

Given :-

Ratio of 10 and 20 rupee note = 3 : 4

Total number of note = 84

To Find :-

Total money in the purse

Solution :-

Let number of 10 rupee note be 3x

And number of 20 rupee note be 4x

According to the Question,

⇒ 3x + 4x = 84

⇒  7x = 84

⇒ x = 84/7

⇒  x = 12

Number of 10 Rupee notes = 36 = Rs. 360

Number of 20 Rupee notes = 48 = Rs. 960

Total Money = Rs. 1320