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प्र: Commissioned - Antonym 1655 0

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    Instruct
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    Empower
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    Nominate
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    Dismiss
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उत्तर : 4. "Dismiss"
व्याख्या :

Answer: D) Dismiss Explanation: Commissioned means Authority granted for a particular action or function.   Here, in the given options Dismiss is the only word which is opposite in meaning to commissioned.   Hence, Antonym of  Commissioned is Dismiss.

प्र: 4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it ? 1654 0

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    40 days
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    36 days
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    32 days
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    34 days
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उत्तर : 1. "40 days"
व्याख्या :

Answer: A) 40 days Explanation: Let 1 man's 1 day work = x and 1 woman's 1 day work = y.Then, 4x + 6y = 1/8 and 3x + 7y = 1/10Solving these two equations, we get:x = 11/400 and y = 1/40010 woman's 1 day work = (1/400 x 10) = 1/40. Hence, 10 women will complete the work in 40 days.

प्र: Two dice are rolled simultaneously. Find the probability of getting the sum of numbers on the on the two faces divisible by 3 or 4? 1654 0

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    3/7
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    7/11
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    5/9
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    6/13
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उत्तर : 3. "5/9"
व्याख्या :

Answer: C) 5/9 Explanation: Here n(S) = 6 x 6 = 36 E={(1,2),(1,5),(2,1),(2,4),(3,3),(3,6),(4,2),(4,5),(5,1),(5,4),(6,3) ,(6,6),(1,3),(2,2),(2,6),(3,1),(3,5), (4,4),(5,3),(6,2)} => n(E)=20 Required Probability n(P) = n(E)/n(S) = 20/36 = 5/9.

प्र: How many Earth- sized Exoplanets have been discovered by NASA around a single star in February 2017 ? 1653 0

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    14
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    7
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    6
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    11
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उत्तर : 2. "7"
व्याख्या :

Answer: B) 7 Explanation: NASA announced a Seven new system of Exoplanets, which are Earth-size, and could potentially hold life.These exoplanets are located outside of our solar system and orbit a star. NASA has named the system of planets after the ‘Transiting Planets and Planetesimals Small Telescope,’ which is located in Chile. This telescope first discovered three of the planets in this system in May 2016. Unlike Earth, which rotates on its axis, the planets are “tidally locked to the star.” This means that one side of the planet has only day, and one side has only night. It also means the weather conditions are unlike what we experience on Earth.

प्र: How long would it take to travel 4 light years? 1652 0

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उत्तर :
व्याख्या :

There are approximately 6 trillion miles in a light-year, so the distance we need to go is 6 trillion miles / light-year times. 4 light-years is equal to 24 trillion miles. So, this whole would take 1.2 billion hours. There are 24 hours a day and 365.25 days per year, so this time in years is 137 thousand years.

प्र: In how many different ways could couples be picked from 6 men and 9 women ? 1646 0

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    26
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    54
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    52
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    28
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उत्तर : 2. "54"
व्याख्या :

Answer: B) 54 Explanation: Number of mens = 8 Number of womens = 5   Different ways could couples be picked = C16× 9C1 = 9 x 6 = 54 ways.

प्र: A contractor undertake to finish a certain work in 124 days and employed 120 men. After 64 days, he found that he had already done 2/3 of the work. How many men can be discharged so that the work may finish in time ? 1638 0

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    64
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    62
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    58
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    56
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उत्तर : 4. "56"
व्याख्या :

Answer: D) 56 Explanation: Days remaining 124 – 64 = 60 days Remaining work = 1 - 2/3 = 1/3 Let men required men for working remaining days be 'm' So men required = (120 x 64)/2 = (m x 60)/1 => m = 64 Men discharge = 120 – 64 = 56 men.

प्र: Which compound contains ionic bonds? 1635 0

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    CaO
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    CO2
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    NO2
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    NO
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उत्तर : 1. "CaO"
व्याख्या :

Answer: A) CaO Explanation: An ionic bond is a chemical bond between two atoms in which one atom seems to donate its electron to another atom.   Here in the given compounds, the compound that contains ionic bond is CaO, Calcium oxide.

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