Twenty five percent of Pranab’s annual salary is equal to eighty percent of Surya’s annual salary.

Co-ordination.

The mouse will continue to have information for presence of tail in its DNA. So, it will continue to have tail because absence of tail is an acquired trait.

Solution: 7000 = 5000 + 200(n-1) Or, 200(n-1) = 2000 Or, n-1 = 10 Or, n = 11

(e) Percentage of marks obtained by Harish =421/678 x 100 = 62.4 = 62

(d)  Surjeet's salary = 80% of 15000 =15000 x 80/100= Rs. 12000

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