on an average of 12 girls have 20 flowers. average flowers of 10 girls is 18. if 11th girl has 25 flowers with her. how many flowers have twelfth girl with her?
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Answer:
No.of flowers 12th girl have = 35
Step-by-step explanation:
average flowers with 12 girls =20
(a1+a2+a3 --------+a12) /12 =20
=12×20 =240
average flowers with 10 girls =18
(a1+a2+a3 --------+a10) /10 = 18
=10×18 =180
= 240 - 180=60
no.of flowers with 11th girl =25
=60 - 25 = 35
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