Так как язык указан не был, написал на C++
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#include
using namespace std;
int main() {
    setlocale(LC_ALL, "Russian");
    const size_t len = 40;
    int arr[40];
    for (size_t i = 0; i < len; ++i)
        arr[i] = 5 - rand() % (10);
    size_t count = 0;
    for (size_t i = 0; i < len; ++i)
        if (arr[i] > 0)
            count++;
    cout << count << endl; return 0;
}