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Answer : 1. "53 "

Q: A box contains 4 different black balls, 3 different red balls and 5 different blue balls. In how many ways can the balls be selected if every selection must have at least 1 black ball and one red ball ? 2474 0

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    24 - 1
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    2425-1
    Correct
    Wrong
  • 3
    (24-1)(23-1)25
    Correct
    Wrong
  • 4
    None
    Correct
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Answer : 3. "(24-1)(23-1)25"
Explanation :

Answer: C) C Explanation: It is explicitly given that all the 4 black balls are different, all the 3 red balls are different and all the 5 blue balls are different. Hence this is a case where all are distinct objects.   Initially let's find out the number of ways in which we can select the black balls. Note that at least 1 black ball must be included in each selection.   Hence, we can select 1 black ball from 4 black ballsor 2 black balls from 4 black balls.or 3 black balls from 4 black balls.or 4 black balls from 4 black balls.   Hence, number of ways in which we can select the black balls   = 4C1 + 4C2 + 4C3 + 4C4= 24-1 ........(A)   Now let's find out the number of ways in which we can select the red balls. Note that at least 1 red ball must be included in each selection.   Hence, we can select 1 red ball from 3 red ballsor 2 red balls from 3 red ballsor 3 red balls from 3 red balls   Hence, number of ways in which we can select the red balls= 3C1 + 3C2 + 3C3=23-1........(B)   Hence, we can select 0 blue ball from 5 blue balls (i.e, do not select any blue ball. In this case, only black and red balls will be there)or 1 blue ball from 5 blue ballsor 2 blue balls from 5 blue ballsor 3 blue balls from 5 blue ballsor 4 blue balls from 5 blue ballsor 5 blue balls from 5 blue balls.   Hence, number of ways in which we can select the blue balls= 5C0 + 5C1 + 5C2 + … + 5C5= 25..............(C)   From (A), (B) and (C), required number of ways=  2524-123-1

Q:

अयोनिका पॉल, एक भारतीय खिलाड़ी किस खेल से संबंधित है?

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    मुक्केबाजी
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    शूटिंग
    Correct
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    पहलवान
    Correct
    Wrong
  • 4
    एथलीट
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Answer : 2. "शूटिंग"

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Answer : 4. "120 "

Q:

1 जनवरी 2033 को सप्ताह का कौन सा दिन होगा?

2473 0

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    शनिवार
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  • 2
    सोमवार
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    रविवार
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  • 4
    मंगलवार
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Answer : 1. "शनिवार"

Q:

लप्पा, लप्पी, किरण और गोखरू क्या हैं?

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    राजस्थानी फिल्म 'सासु माँ में किरदार
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    गोटा की विभिन्न किस्में
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    शेरवानी के नाम
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    अधिक उपज देने वाले कीट (किडनी बीन, फेज़ियोलस एकोनाइट फोलियस) की किस्में
    Correct
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Answer : 2. "गोटा की विभिन्न किस्में"
Explanation :

लप्पा, लप्पी, किरण, बांकली, बिजिया, मुकेश और चम्पाकली गोटे के प्रकार हैं। खण्डेला(सीकर) और भिनाय(अजमेर) गोटा निर्माण के प्रमुख केन्द्र हैं। जयपुर में हाथीदांत की कलात्मक चुड़ियां बनाई जाती है। पीतल के बर्तनों की खुदाई करके उस पर कलात्मक नक्काशी का कार्य मुरादाबादी कला कहलाती है।

Q:

यदि 841 का वर्गमूल 29, है, 0.0000084  का वर्गमूल किसके बराबर है ?

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    0.029
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    0.0029
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    Wrong
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    0.00029
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    Wrong
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    0.29
    Correct
    Wrong
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Answer : 2. "0.0029"

Q:

कम्प्यूटर____ के साथ विशेष रूप से काम करके डाटा को जानकारी में बदलता है : 

2473 1

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    कैरेक्टर्स
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  • 2
    नंबर्स
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    Wrong
  • 3
    मल्टीमीडिया
    Correct
    Wrong
  • 4
    वर्ड्स
    Correct
    Wrong
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Answer : 2. "नंबर्स "

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