I
a
.
.
.
(d) एउटा वर्गाकार खेतको क्षेत्रफल
o
e breadth is 3: 1.
कल 48400 वर्ग मी. छ । यदि कुनै मानिस 5 मिनेटमा त्यो खेतको वरिपरि दौड्न सक्छ भने उसले
प्रति घण्टा कात किलोमिटर दौड्न सक्छ ? the area of a square field is 48400 m. if a man runs round the field in
5 minutes, how many kilometers per hour does he run?
[047 r]
107

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?