Which number can be added to the data so that the range of the data will be 55?
56, 81, 54, 47, 45, 94

39

Step-by-step explanation:

56, 81, 54, 47, 45, 94

A.49

B.98

C.39

D.6

C since the highest number is 94. If we were to use the formula  highest number-smallest number= range, the highest number is 94 and the range is 55. 94-x=55. 94-39=55

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls