Hope the answer I gave you helps!!!
:)
Answer:
Therefore the required ways are =190
Step-by-step explanation:
Combination: Combination is the number of selection of items from a collection of items where the order of selection does not matter.
Total number of smartphones =22
Defective phone = 2
Non defective phone = (22-2) =20
The control inspector randomly test 4 smartphones of which 2 are defective.
Non defective phone = 2
The ways to select 2 non defective phone is

The ways to select 2 defective phone is= 
Therefore the required ways are = (190×1) =190
-18.2 + 3.6= -14.6 is the answer to the question
Answer:

Step By Step Explanation:
Apply Exponent Rule 


Rewrite 84: 
Rewrite 24: 

Factor Out Common Term 

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