3 pens and 5 pencils together cost ₹ 35, whereas 5 pens and 3 pencils together cost ₹ 37. The cost of a pencil is ………………
A) ₹ 5
B) ₹ 3
C) ₹ 4
D) ₹ 6
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A box contains pencils and pens. The probability of picking out a pen at random is 0.65. Then the probability of not picking a pen is
Correct option is: A) 0.35 Probability of not picking a pen = 1- 0.65 = 0.35
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A box contains pencils and pens. The probability of picking out a pen at random is 0.65. Then the probability of not picking a pen is
2 Answers
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3 pens and 5 pencils together cost ₹ 35, whereas 5 pens and 3 pencils together cost ₹ 37. The cost of a pencil is ………………
Correct option is (C) ₹ 4 Let cost of 1 pen is Rs x and cost of 1 pencil is Rs y. \(\because\) Cost of 3 pens & 5 pencils is Rs 35. \(\therefore\) 3x...
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The total cost of six books, five pencils and seven sharpeners is Rs. 115 and that of eight books,
Correct option is (B) Book Let the cost of 1 book, 1 pencil and 1 sharpener is Rs. x, y & z respectively. \(\therefore\) According to given conditions 6x + 5y + 7z = 115 ...
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The total cost of six books, five pencils and seven sharpeners is Rs. 115 and that of eight books,
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Total cost of 14 pens and 21 books is Rs. 130 and the total cost of 6 pens and p books is Rs. 90. Which of the following cannot be the value of p ?
Correct option is D) 9
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If 15 cups of tea and 17 cups of coffee together cost Rs. 241 and 25 cups of tea and 13 cups of coffee together cost Rs. 279.
Correct option is A) Rs. 7and Rs. 8
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Calculate (a) Implicit cost (b) Explicit cost and (c ) Econimic cost from the following: `{:(," Paticulars","(Rs. in Lakh)"),((i),"Payment of salaries
Correct Answer - Rs. 8600 Lakh (a) Explicit cost: (i)+(ii)=5000+2000=7000 (b) Implicit cost: (iii)+(v)+(vi)=1000+200+400=1600 (c ) Economic cost: (a) + (b)=7000+1600=86000
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The cost of 4 kg onion, 3 kg wheat and 2 kg rice is Rs 60. The cost of 2 kg onion, 4 kg wheat and 6 kg rice is Rs 90. The cost of 6 kg onion 2 kg whea
Let the cost of 1 kg wheat and 1 kg rice be ₹x, ₹ y and ₹ z respectively Given that , 4x+3y+2z=60 2x+4y+6z=90 6x+2y + 3z = 70 `rArr"...
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If a box has 100 pens of which 10 are defective, then what is the probability that out of a sample of 5 pens drawn one by one with replacement atmost
Here, n=5,p`=10/100=1/10andq=9/10` `rle1` `rArrr=0,1` Also, `P(X=r)=""^(n)C_(r)p^(r )q^(n-r)` `therefore P(X=r)=P(r=0)+P(r=1)` `=""^(5)C_(0)(1/10)^(0)(9/10)^(4)` `=(9/10)^(5)+5cdot1/10cdot(9/10)^(4)` `(9/10)^(5)+1/2(9/10)^(4)`
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