The mean height of 60 boys and 40 girls is 160 cm. If the average height of the boys is
165 cm, the average height of the girls is :
60 জন ল'ৰা আৰু 40 জনী ছােৱালীৰ গড় উচ্চতা 160 cm। ল’ৰাবিলাকৰ গড় উচ্চতা 165 cm হলে
ছােৱালীবিলাকৰ গড় উচ্চতা হ’ব ঃ
(a) 160 cm.
(b) 155.5 cm
(c) 152.5 cm
(d) 163 cm
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