Mathematics
Average / Arithmetic Mean
For values 19, 29, 39 with frequencies 2, 4, 6, what is the weighted mean?
A. 33.33
B. 32.33
C. 31.33
D. 34.33
Correct Answer: B
Weighted mean = Σfx/Σf = 32.33.
Mathematics
Average / Arithmetic Mean
For values 18, 28, 38 with frequencies 4, 3, 5, what is the weighted mean?
A. 29.83
B. 28.83
C. 27.83
D. 30.83
Correct Answer: B
Weighted mean = Σfx/Σf = 28.83.
Mathematics
Average / Arithmetic Mean
For values 17, 27, 37 with frequencies 3, 5, 4, what is the weighted mean?
A. 27.83
B. 26.83
C. 29.83
D. 28.83
Correct Answer: A
Weighted mean = Σfx/Σf = 27.83.
Mathematics
Average / Arithmetic Mean
For values 16, 26, 36 with frequencies 2, 4, 6, what is the weighted mean?
A. 30.33
B. 29.33
C. 28.33
D. 31.33
Correct Answer: B
Weighted mean = Σfx/Σf = 29.33.
Mathematics
Average / Arithmetic Mean
For values 15, 25, 35 with frequencies 4, 3, 5, what is the weighted mean?
A. 24.83
B. 26.83
C. 25.83
D. 27.83
Correct Answer: C
Weighted mean = Σfx/Σf = 25.83.
Mathematics
Average / Arithmetic Mean
For values 14, 24, 34 with frequencies 3, 5, 4, what is the weighted mean?
A. 23.83
B. 25.83
C. 26.83
D. 24.83
Correct Answer: D
Weighted mean = Σfx/Σf = 24.83.
Mathematics
Average / Arithmetic Mean
For values 13, 23, 33 with frequencies 2, 4, 6, what is the weighted mean?
A. 27.33
B. 26.33
C. 28.33
D. 25.33
Correct Answer: B
Weighted mean = Σfx/Σf = 26.33.
Mathematics
Average / Arithmetic Mean
For values 12, 22, 32 with frequencies 4, 3, 5, what is the weighted mean?
A. 24.83
B. 23.83
C. 22.83
D. 21.83
Correct Answer: C
Weighted mean = Σfx/Σf = 22.83.
Mathematics
Average / Arithmetic Mean
For values 11, 21, 31 with frequencies 3, 5, 4, what is the weighted mean?
A. 23.83
B. 21.83
C. 22.83
D. 20.83
Correct Answer: B
Weighted mean = Σfx/Σf = 21.83.
Mathematics
Average / Arithmetic Mean
For values 10, 20, 30 with frequencies 2, 4, 6, what is the weighted mean?
A. 23.33
B. 24.33
C. 22.33
D. 25.33
Correct Answer: A
Weighted mean = Σfx/Σf = 23.33.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 4 kg at Rs. 335/kg with 5 kg at Rs. 350/kg. What is the average cost per kg?
A. 348.33
B. 353.33
C. 343.33
D. 338.33
Correct Answer: C
Average mixture cost = (4×335+5×350)/9 = Rs. 343.33.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 3 kg at Rs. 320/kg with 7 kg at Rs. 340/kg. What is the average cost per kg?
A. 334
B. 344
C. 339
D. 329
Correct Answer: A
Average mixture cost = (3×320+7×340)/10 = Rs. 334.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 6 kg at Rs. 305/kg with 6 kg at Rs. 330/kg. What is the average cost per kg?
A. 322.5
B. 312.5
C. 317.5
D. 327.5
Correct Answer: C
Average mixture cost = (6×305+6×330)/12 = Rs. 317.5.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 5 kg at Rs. 290/kg with 5 kg at Rs. 320/kg. What is the average cost per kg?
A. 305
B. 315
C. 310
D. 300
Correct Answer: A
Average mixture cost = (5×290+5×320)/10 = Rs. 305.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 4 kg at Rs. 275/kg with 7 kg at Rs. 310/kg. What is the average cost per kg?
A. 307.27
B. 292.27
C. 302.27
D. 297.27
Correct Answer: D
Average mixture cost = (4×275+7×310)/11 = Rs. 297.27.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 3 kg at Rs. 260/kg with 6 kg at Rs. 300/kg. What is the average cost per kg?
A. 281.67
B. 286.67
C. 296.67
D. 291.67
Correct Answer: B
Average mixture cost = (3×260+6×300)/9 = Rs. 286.67.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 6 kg at Rs. 245/kg with 5 kg at Rs. 290/kg. What is the average cost per kg?
A. 265.45
B. 270.45
C. 260.45
D. 275.45
Correct Answer: A
Average mixture cost = (6×245+5×290)/11 = Rs. 265.45.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 5 kg at Rs. 230/kg with 7 kg at Rs. 280/kg. What is the average cost per kg?
A. 254.17
B. 269.17
C. 264.17
D. 259.17
Correct Answer: D
Average mixture cost = (5×230+7×280)/12 = Rs. 259.17.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 4 kg at Rs. 215/kg with 6 kg at Rs. 270/kg. What is the average cost per kg?
A. 243
B. 258
C. 248
D. 253
Correct Answer: C
Average mixture cost = (4×215+6×270)/10 = Rs. 248.
Mathematics
Average / Arithmetic Mean
A shopkeeper mixes 3 kg at Rs. 200/kg with 5 kg at Rs. 260/kg. What is the average cost per kg?
A. 247.5
B. 242.5
C. 232.5
D. 237.5
Correct Answer: D
Average mixture cost = (3×200+5×260)/8 = Rs. 237.5.