Start learning 50% faster. Sign in now
Let the sum of age of 19 girls be x years and the Age of the new girls be y years. Old Average = (Sum of the age of 19 girls + Age of the girl to be replaced)/Total number of girls => (x + 18) / 20 New Average = (Sum of the age of 19 girls + Age of the new girl) / 20 According to the question, As we know The average age of the girls is decreased by 2 months when one girl aged 18 years is replaced i.e. Old Averag - New Average = 2 month ⇒ {(x + 18)/20} – {(x + y)/20} = (2/12) ⇒ 18 – y = 10/3 ⇒ y = 44/3 years ⇒ y = 14 years 8 months ∴ The age of new girl is 14 years 8 months.
In cricket, who is the men’s ICC Player of the Month for November?
Which of the following statements about the Marburg virus disease (MVD) is correct?
I. MVD was first discovered in Tanzania.
II. MVD is ca...
What is the main objective of the AI-powered platform 'Incubators' developed by the Centre for Research on Start-ups and Risk Financing (CREST) at IIT M...
India’s goods exports contracted by what percentage in July, reaching the lowest level in eight months?
Which country has agreed to import 500,000 tonnes of wheat from India?
What is the focus area of the India-Slovenia Programme of Cooperation (PoC) for 2024–2029?
Which Indian Company retain its second position, according to the ‘IT Services 25’ list prepared by UK-based consultancy Brand Finance for the year ...
The RBI has imposed a penalty of ________ on Central Bank of India (the bank) for non-compliance with certain provisions of norms related to fraud class...
What pledge does the “Bal Vivah Mukt Bharat” campaign aim to achieve?
Which regulatory body in India launch Industrial Outlook Survey in India?