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The mean of the height of six girls is 148 cm. if the individual heights of five of them are 150cm, 146 cm, 142 cm and 145cm, find the height of the sixth girl.

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Mean of the height s of six girls = 148 cm.
Sum of the heights of six girls =` ( 148xx 6) cm ` = 888 cm
Sum of the heights of the five grils
= (150 +154+146+142+145)cm = 737 cm
Height of the sixth girl = (888 -737) cm = 151 cm
Hence, the height of the sixth girl is 151 cm .

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