Practice Question and Answer
8Q: In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there ? 1924 05b5cc774e4d2b41977750011
5b5cc774e4d2b41977750011- 1205false
- 2194false
- 3209true
- 4159false
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Answer : 3. "209"
Explanation :
Answer: C) 209 Explanation: We may have (1 boy and 3 girls)or(2boys and 2 girls)or(3 boys and 1 girl)or(4 boys). Required number of ways = (C16× C34) + C26×C24 + (C36× C14) + (C46) = (24+90+80+15) = 209.
Q: Which, among the following industries , consumes the maximum power? 1924 05b5cc7c5e4d2b41977750cd7
5b5cc7c5e4d2b41977750cd7- 1aluminiumtrue
- 2coalfalse
- 3steelfalse
- 4petroleum refiningfalse
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Answer : 1. "aluminium"
Explanation :
Answer: A) aluminium Explanation:
Q: A colour blind person has difficulty in distinguishing which of the two colours ? 1924 05b5cc6cce4d2b4197774e15d
5b5cc6cce4d2b4197774e15d- 1Green & Redtrue
- 2White & Redfalse
- 3Blue & Redfalse
- 4Red & Blackfalse
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Answer : 1. "Green & Red"
Explanation :
Answer: A) Green & Red Explanation:
Q: पित्त किसके द्वारा निर्मित होता है ?
1924 05df9e5a08014020c092eb585
5df9e5a08014020c092eb585- 1यकृतtrue
- 2आमाशयfalse
- 3अग्न्याशयfalse
- 4लघ्वांत्राग्रfalse
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Answer : 1. "यकृत "
Q: In which year, the first bank of India "Bank of Hindustan" was established ? 1924 05b5cc6d8e4d2b4197774e796
5b5cc6d8e4d2b4197774e796- 11677false
- 21770true
- 31796false
- 41831false
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Answer : 2. "1770"
Explanation :
Answer: B) 1770 Explanation: Among the first banks were the Bank of Hindustan, which was established in 1770 and liquidated in 1829-32.
Q: खोदा पहाड़ निकली चुहिया लोकोक्ति का अर्थ है ?
1924 05e44e4a03268f12963f41ca0
5e44e4a03268f12963f41ca0- 1पहाड़ खोदने पर चुहिया का निकलनाfalse
- 2अधिक परिश्रम के बाद थोडा लाभtrue
- 3कम परिश्रम में लाभ ही लाभfalse
- 4पहाड़ पर चुहिया के साथ चड़नाfalse
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Answer : 2. "अधिक परिश्रम के बाद थोडा लाभ"
Q: A letter lock consists of three rings each marked with six different letters. The number of distinct unsuccessful attempts to open the lock is at the most ? 1924 05b5cc6e1e4d2b4197774ebde
5b5cc6e1e4d2b4197774ebde- 1215true
- 2268false
- 3254false
- 4216false
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Answer : 1. "215"
Explanation :
Answer: A) 215 Explanation: Since each ring consists of six different letters, the total number of attempts possible with the three rings is = 6 x 6 x 6 = 216. Of these attempts, one of them is a successful attempt. Maximum number of unsuccessful attempts = 216 - 1 = 215.
Q: Kalyan purchased a Maruti van for Rs. 1,96,000 and the rate of depreciation is 14(2/7) % per annum. Find the value of the van after two years ? 1924 05b5cc701e4d2b4197774f170
5b5cc701e4d2b4197774f170- 1Rs. 1,24,000false
- 2Rs. 1,44,000true
- 3Rs. 1,32,000false
- 4Rs. 1,62,000false
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Answer : 2. "Rs. 1,44,000"
Explanation :
Answer: B) Rs. 1,44,000 Explanation: Value of Maruti Van, V1 = Rs. 1,96,000Rate of depreciation, r = 14(2/7)% = 100/7%; Time, t = 2 yearsLet V2 is the value after depreciation. V2 = V11 - r100tV2 = 196001 - 10071002 V2 = 196000(6/7)(6/7) V2 = (196000x36)/49 = Rs. 1,44,000.