Problem 14. Find the numeric mean of the prime numbers in a matrix.

Solution 1640001

Submitted on 8 Oct 2018 by Philippe S.

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Dave on 13 Mar 2020 at 18:40

how can the mean of the primes of [ 1 2 3] be 2.5?
The mean of the primes which are 1 & 3 is 2.

Alberto Chavez on 31 Mar 2020 at 3:11

1 is not a prime number, so therefore 2+3=5, 5/2=2.5

Test	Status	Code Input and Output
1	Pass	x = 3; y_correct = 3; assert(isequal(meanOfPrimes(x),y_correct)) [Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In meanOfPrimes (line 2) In ScoringEngineTestPoint1 (line 3) In solutionTest (line 3)]
2	Pass	x = [1 2 3]; y_correct = 2.5; assert(isequal(meanOfPrimes(x),y_correct)) [Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In meanOfPrimes (line 2) In ScoringEngineTestPoint2 (line 3) In solutionTest (line 5)]
3	Pass	x = [3 3; 3 3]; y_correct = 3; assert(isequal(meanOfPrimes(x),y_correct)) [Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In meanOfPrimes (line 2) In ScoringEngineTestPoint3 (line 3) In solutionTest (line 7)]
4	Pass	x = [7 3 8 8]'; y_correct = 5; assert(isequal(meanOfPrimes(x),y_correct)) [Warning: Function assert has the same name as a MATLAB builtin. We suggest you rename the function to avoid a potential name conflict.] [> In unix (line 32) In meanOfPrimes (line 2) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)]