25) Find the area of an isosceles right angle triangle whose equal sides are 15 cm each
26) The mean of 5 numbers is 27.if one number is excluded their mean is 25. Find the excluded
observation
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Check the answer below !!
Step-by-step explanation:
1) Area of triangle = 1 × bh
2
= 1 × 15 × 15
2
= 112.5
2) Mean of 5 number = 27
sum of five number = 27 × 5
= 135
Mean of 4 number = 25
sum of 4 number = 25 × 4
= 100
excluded number = 135 - 100
= 35.
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