Answer:
b.
Step-by-step explanation:
<u>Answer:</u>
5, 7
<u>Step-by-step explanation:</u>
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:


⇒ 
⇒ 
This means 5 and 7 are the hidden cards.
This equation can be written as
(v-8)(v+5)/ (v-8)(v-3)
= v+5/v-3
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