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 A man has Rs . 960 in denominations of one rupee coins , five rupee coins and ten rupee coins . The number of coins in each denomination is equal . What is the total number of coins

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CSIR CERI JSA Official Paper-I (Held On: 2022)
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  1. 90
  2. 120
  3. 150
  4. 180

Answer (Detailed Solution Below)

Option 4 : 180
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Detailed Solution

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Given:

Total amount = Rs. 960

Denominations of coins: 1 rupee, 5 rupees, and 10 rupees

Number of coins in each denomination is equal

Formula Used:

Total value = (Number of coins) × (Denomination)

Calculation:

Let the number of coins in each denomination be x.

Value of 1 rupee coins = 1 × x = x

Value of 5 rupee coins = 5 × x = 5x

Value of 10 rupee coins = 10 × x = 10x

Total value = x + 5x + 10x = 16x

Given total value = Rs. 960

⇒ 16x = 960

⇒ x = 960 / 16

⇒ x = 60

Total number of coins = 3x = 3 × 60 = 180

∴ The total number of coins is 180.

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Latest CSIR Junior Secretariat Assistant Updates

Last updated on May 21, 2025

->The CSIR Junior Secretariat Assistant Provisional Response Sheet has been released on 21st May 2025 at the official website.

-> The CSIR Junior Secretariat Assistant Notification 2025 written examination dates has been released for Advt No. CRRI/02/PC/JSA-JST/2025.

-> Candidates had applied online from 22nd March to 21st April 2025.  

-> The CSIR JSA salary ranges from INR 19,900 - INR 63,200 (Indian Institute of Petroleum, Dehradun) and INR 35,600 (Indian Institute of Toxicology Research).

-> The selection of candidates for this post will be based on a Written Exam, followed by a Computer Typing Test.

-> Prepare for the exam with CSIR Junior Secretariat Assistant Previous Year Papers.

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