Latest MBA Aptitude Question SOLUTION: The first 5 odd natural numbers are written in every possible order. How many numbers can be formed if no repetition is allowed and what is their sum?

1) 5P5, 6666600

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Previous Question: two alloys A & B contain copper and zinc in the ratio 4:9 and 5:6 respectively. if equal weights of the two are melted together to form a third alloy,find the ratio of weights of copper and zinc in the third alloy named C.?

1) 54/84
2) 119/177
3) 109/177
4) None of these
Next Question: length of sides of right angled triangle are (2log(base2)x^2)-3 , log(base2)x^3 , 1+log(base2)x.all sides are in integers.if side of length log(base2)x^3 is not the hypotenuse and x>4 the area of triangle is

1) 12
2) 24
3) 30
4) 40

(#M40014972) MBA question permutations and combinations, probability Keep an EYE

The first 5 odd natural numbers are written in every possible order. How many numbers can be formed if no repetition is allowed and what is their sum?

1) 5P5, 6666600
2) 5C1, 10^5
3) 51, 55555
4) 50, 666660
5) None of these

Asked In MBA (11 years ago)

Unsolved Read Solution (1)

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Read Solution (1) :

Priyanka R  (10 years ago)

The first five odd numbers are 1,3,5,7,9. Thus we have 5 numbers in total and no repetition is allowed while arranging.
Any of the 5 numbers can be the ones position. Since a number has already occupied ones position, only the remaining 4 can fill up the tens position. If we consider this way, the no. of possible arrangements will be 1*2*3*4*5 which is nothing but 5!.. To find the sum, 5! is 120 and there are 5 numbers. each number would occur in the ones position 120/5 (i.e.24)times.

Thus 1*24 + 3*24 +5*24 + 7*24 = 660.

The correct answer is 5!numbers and sum is 6666600

Is this solution Helpfull? Yes (1) | No   

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Previous Question: two alloys A & B contain copper and zinc in the ratio 4:9 and 5:6 respectively. if equal weights of the two are melted together to form a third alloy,find the ratio of weights of copper and zinc in the third alloy named C.?

1) 54/84
2) 119/177
3) 109/177
4) None of these
Next Question: length of sides of right angled triangle are (2log(base2)x^2)-3 , log(base2)x^3 , 1+log(base2)x.all sides are in integers.if side of length log(base2)x^3 is not the hypotenuse and x>4 the area of triangle is

1) 12
2) 24
3) 30
4) 40

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