Question
Out of three girls and five boys, five children are to
be randomly selected for a dance programme. What is the probability that all the selected children are boys?Solution
The probability that all the selected children are boys = 5C5/8C5 =1/ [8!/(5! ×3!)] = 1/56
The following series is based on the English alphabets. Which one of the following will come in place of the question mark in the given alphabetical ser...
‘X’ and ‘Y’ invested Rs. 6000 and Rs. 7500 respectively for 10 months and 8 months respectively in a business. X gave away 60% of his profit to ...
Detemine the value of .

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Pick the odd one out.
Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
21 * 4 * 156 * 13 * 11 = 83
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If all the letters of the word COMMUNITY are replaced by their immediate succeeding letter (in alphabetical series), then from the left end which letter...
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निम्नलिखित प्रश्नों में, प्रश्नवाचक चिन्ह(?) के स्थान पर ल�...