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@ 2018-07-29T18:08:20Z

<?php

    $TestResult = [
       'Smith' => ['98', '100', '78', '91'],
       'Johnson' => ['67', '85', '92', '88']
    ];

    $Total = array_sum($TestResult['Smith']);
    $Average = $Total/count($TestResult['Smith']);

    echo $Average;

Output
Performance
VLD
References
Branches

array_sum: documentation ( source)

preferences:dark modelive previewkey bindings

121.6 ms | 404 KiB | 5 Q