The mean expenditure of a person from Monday to Wednesday is Rs.250, and the mean expenditure from Wednesday to Friday is Rs. 400. If he spend Rs. 300 on Wednesday, find the mean expenditure of the person from Monday to Friday.
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एक प्रशिक्षक के पास 300 सत्य/असत्य प्रकार के आसान प्रश्न 200 सत्य/असत्य प्रकार के कठिन प्रश्न 500 बहु विकल्पीय प्रकर के आसान प्रश्न और 400 बहु- विकल्प
Correct Answer - `5/9`
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Lacto bacillus has generation time 60 min. at 300 K and 40 min. at 400 K. Determine activation energy in `(kJ)/(mol)` . (`R = 8.3 J K^ (–1) mol^(–1)`
Correct Answer - 3.98
2 Answers 2 views
If `(1+x^(2))^(n) =sum_(r=0)^(n) a_(r)x^(r )= (1+x+x^(2)+x^(3))^(100)`. If `a = sum_(r=0)^(300)a_(r)`, then `sum_(r=0)^(300) ra_(r)` is
Correct Answer - D `(1-x)^(n)(1+x)^(n)=underset(r=0)overset(n)suma_(r)x^(r)(1-x)^(n)(1-x)^(n-r)` or `(1-x+2x)^(n) = underset(r=0)overset(n)suma_(r)x^(r)(1-x)^(n-r)` or `underset(r=0)overset(n)sum.^(n)C_(r)(1-x)^(n-r)(2x)^(r)=underset(r=0)overset(n)suma_(r)x^(r)(1-x)^(n-r)` Comparing general term, we get `a_(r) = .^(n)C_(r)2^(r)`.
2 Answers 1 views
Payment of honorarium to secretary is treated as - (A) Capital expenditure (B) Revenue expenditure
Correct option is: (B) Revenue expenditure
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C=100+0.4 Y is the consumption Function of an economy where C is consumption expenditure and Y is National income , Inestment expenditure is 1,100 cal
Correct Answer - {(Rs. 2000;(ii) Rs.900)} {(Rs.2000;(ii) Rs.900)} {(Rs.4100;(ii) Rs.2100)}
2 Answers 1 views
3. Suppose set \( A \) consists of first 250 natural numbers that are multiples of 3 and set \( B \) consists of first 200 even natural numbers. How many elements does \( A \cup B \) have? (a) 324 (b) 364 (c) 384 (d) 400
Given: n(A)=250 n(B)=200 A={3,6,9,12,.......750} B=2,4,6,8,10.......400} Therefore,A⋂B={6,12,18....396) =>n(A⋂B)=396/6=66 n(A∪B)=n(A)+n(B)-n(A⋂B) =250+200-66 ...
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If the momentum of a body is doubled, its KE. increases by (A) 50% (B) 300% (C) 100% (L) 400%
Correct option is: (B) 300% Kinetic energy , K = \(\frac{P^2}{2m}\) When momentum p is doubled , the kinetic energy becomes \(K^1 = \frac{(2p)}{2m}\) \(K^1 = 4 (\frac{p^2}{2m})\) \(K^1 = 4K\) increases in kinetic energy = \(\frac{K^1 -...
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If the momentum of a body is doubled, its KE. increases by (A) 50% (B) 300% (C) 100% (L) 400%
2 Answers
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Shyama bought 5 kg 300 g apples and 3 kg 250 g mangoes. Sarala bought 4 kg 800 goranges and 4 kg 150 g bananas. Who bought more fruits?
Correct Answer - सरला ने अधिक फल खरीदे।
2 Answers 1 views
MONDAY शब्द के अक्षरों में से कितने, अर्थपूर्ण या अर्थहीन , शब्द बन सकते हैं , यह मानते हुए कि किसी भी अक्षर की पुनरावृत्ति नहीं की जाती है, (i) यदि ए
Correct Answer - (i) 360, (ii) 720, (iii) 240
2 Answers 4 views