There are two rows, each containing 3 numbers. Some rules are given below to be used for obtaining the resultant number for each row separately. Apply the rules for each row from left to right and answer the question. Rules: i. If an even number is followed by an even number, the first is to be subtracted from the second. ii. If an odd number is followed by an odd number, both are to be added. iii. If an odd number is followed by an even number, the even number is to be subtracted from the square of the odd number. iv. If an even number is followed by an odd number, the odd number is to be subtracted from the even number. Row I: 28, 19, 12 Row II: 13, 7, 32 What is the average of the resultant numbers of the first row and the second row?

LohaHridoy
  1. 49.0
  2. 37.5
  3. 40.5
  4. 50.5

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AhmedNazir

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Option 3 : 40.5

Given Rows 

Row I: 28, 19, 12

Row II: 13, 7, 32

Using the above rules The Row 1 can be 

Row I: 28, 19, 12, From left to right the even number followed by odd number. So, use the rule iv

⇒ (28 - 19) = 9

Row I: 9, 12 From left to right the odd number followed by even number. So, use the rule iii

⇒ (9² - 12) 

⇒ 81 - 12 = 69

Row I= 69

Using the above rules The Row 2 can be 

Row II: 13, 7, 32 From left to right the odd number followed by odd number. So, use the rule ii

⇒ (13 + 7) 

⇒ = 20

Row II: 20, 32 From left to right the even number followed by even number. So, use the rule i

⇒ (32 - 20)

⇒ = 12

Row II = 12

Average of Row I and Row II are = (69 + 12) ÷ 2

⇒ 81 ÷ 2

= 40.5

Hence, "40.5" is the answer.

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