Question

How to do this question plz answer me ​

Answer 1

Answer:

6

Step-by-step explanation:

The mean is calculated as

mean = $\frac{sum}{count}$

let x be the fourth number, then

$\frac{9+14+15+x}{4}$ = 11 ( multiply both sides by 4 )

38 + x = 44 ( subtract 38 from both sides )

x = 6

The number on the fourth card is 6