Question

Please help me with this on the picture

Answer 1

5, 7

Explanation:

The mode of the numbers is 5, which means that 5 should be the most common card (highest frequency). Therefore the cards should have at least one more 5 among them.

Considering that 5 is one of the hidden cards and x is the other,

• Using the equation for the mean:

`mean = (sum \space\ \space\ of \space\ \space\ numbers)/(number \space\ \space\ of \space\ \space\ numbers)`

`6 = (4+5+ 9 + 5 + x)/(5)`

⇒
`30=23 + x`

⇒
`x = 7`

This means 5 and 7 are the hidden cards.