GMAT Question 3

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subhasis8877: Senior | Next Rank: 100 Posts; Posts: 77; Joined: Tue Mar 10, 2009 3:10 am

by subhasis8877 » Tue Aug 18, 2009 8:06 am

Please refer the attachment

Attachments

Source: Beat The GMAT — Problem Solving | Tue Aug 18, 2009 8:06 am

prindaroy: Master | Next Rank: 500 Posts; Posts: 113; Joined: Thu Jul 16, 2009 11:23 am; Thanked: 15 times; GMAT Score:730

by prindaroy » Tue Aug 18, 2009 11:23 am

mean = 100

one standard deviation below = 100 - 22.4 = 77.6. So numbers below 77.6 are 75 and 70. so Two.

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