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5, 8, 3, 7 How many different numbers k are there such that
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06 Dec 2019, 02:39
06 Dec 2019, 02:39
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Question Stats:
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41% (01:27) wrong based on 17 sessions
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\(5, 8, 3, 7 \)
How many different numbers k are there such that the sum of k and 3 of the 4 numbers shown equals 24?
A. 4
B. 5
C. 6
D. 8
E. Infinitely many
Kudos for the right answer and explanation
How many different numbers k are there such that the sum of k and 3 of the 4 numbers shown equals 24?
A. 4
B. 5
C. 6
D. 8
E. Infinitely many
Kudos for the right answer and explanation
Re: 5, 8, 3, 7 How many different numbers k are there such that
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09 Dec 2019, 10:04
09 Dec 2019, 10:04
2
If we add up the four digits we will acquire 23
5+8+3+7 = 23
Since the sum is less than 24
the answer is as easy as choosing 3 digits out of 4 total digits considering the fact that their sequence is not important;
It means the answer in nCr type will be 4C3( choice of 3 out of 4) = 4
for that 4 kinds of 3 digits number, we will have one specific K
5+8+3+k = 24 ----> K = 8
5+8+7+k = 24 ----> K = 4
5+3+7+k = 24 ----> K = 5
8+3+7+k = 24 ----> K = 6
5+8+3+7 = 23
Since the sum is less than 24
the answer is as easy as choosing 3 digits out of 4 total digits considering the fact that their sequence is not important;
It means the answer in nCr type will be 4C3( choice of 3 out of 4) = 4
for that 4 kinds of 3 digits number, we will have one specific K
5+8+3+k = 24 ----> K = 8
5+8+7+k = 24 ----> K = 4
5+3+7+k = 24 ----> K = 5
8+3+7+k = 24 ----> K = 6
5, 8, 3, 7 How many different numbers k are there such that
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09 Oct 2024, 11:13
09 Oct 2024, 11:13
Carcass wrote:
\(5, 8, 3, 7 \)
How many different numbers k are there such that the sum of k and 3 of the 4 numbers shown equals 24?
A. 4
B. 5
C. 6
D. 8
E. Infinitely many
Kudos for the right answer and explanation
How many different numbers k are there such that the sum of k and 3 of the 4 numbers shown equals 24?
A. 4
B. 5
C. 6
D. 8
E. Infinitely many
Kudos for the right answer and explanation
But it's not mentioned that K must be an integer here? and if it explicitly doesn't mention k being an integer then there could be infinitely many values right?
