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(d) The frequency distribution for the value of resistance in ohms of 38 resistors is as shown. Determine the mean, median and mode value of resistance. Groups: Frequency: Class width: 20.5-20.9 6 0.5 21.0-21.4 8 0.5 21.5-21.9 12 0.5 22.0-22.4 8 0.5 22.5-22.9 4 0.5

Fig: 1