Question

The upper limit and the class mark of a class interval are 145 and 142.5 respectively what is the lower limit

Answer 1

Answer:

140

Steps:

class interval=(upper limit+lower limit)÷2

142.5=(145+lower limit)÷2

142.5×2=(145+lower limit)

285=(145+lower limit)

285-145=lower limit

lower limit=140