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.
Highly Salt tolerant crop is
Calculate the bulk density of a 400 cm3 soil sample that weighs 575 g (oven dry weight).
What is the initial substrate for glycolysis?
Red delicious is the variety of which fruit?
Among the given crops, which crop has the highest percentage of irrigated area?
A collection of plasmid clone containing recombinant DNA molecules so that the sum total of DNA insert represent the entire genome of the concerned org...
Which of the following statements is not correct regarding ionic bond?
Tobacco plant grows and matures rapidly when average temperature is about:
Fertiliser is defined as
Which of the following statement is correct about cartilage?