1.

1). 432). 593). 674). Cannot be determined

Answer»

Given,

Average salary for chemical trade(in lacs per ANNUM) = Rs. 2.45

Average salary for electronics trade(in lacs per annum) = Rs. 3.56

Average salary for chemical trade and electronics trade(in lacs per annum) = Rs. 3.12

Let the number of students in Chemical be a and number of students in Electronics be b.

$(\therefore\;\FRAC{{2.45\;\TIMES\;a\;+\;3.56\;\times\;b}}{{a\;+\;b}}\;=\;3.12)$

⇒ 2.45a + 3.56b = 3.12a + 3.12b

⇒ 0.44b = 0.67a

⇒ b/a = 67/44

⇒ b = 67a/44

For b to be an INTEGER the least value will be 67



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