1.

The average height of Kamlesh, Bimla and Alok is 120 cm. If the average height of Kamlesh and Bimla is 125 cm. Find the height of Alok.1. 175 cm2. 110 cm3. 160 cm4. 135 cm

Answer» Correct Answer - Option 2 : 110 cm

Given

Average height of Kamlesh, Bimla and Alok = 120 cm

Average height of Kamlesh and Bimla = 125 cm

Formula used

Average = Sum of all observations / Number of observations

Calculation

(Kamlesh + Bimla + Alok) / 3 = 120

⇒ Kamlesh + Bimla + Alok = 360         ...(1)

(Kamlesh + Bimla) / 2 = 125

Kamlesh + Bimla = 250         ...(2)

From (1) and (2)

Alok + 250 = 360

⇒ Alok = 110

⇒ Alok’s height is 110 cm.


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