The number of boys and girls in a school is 140 and 250 respectively. 30% of boys left the school while 30 girls took admission in the school. Find the new ratio of boys to girls in the school.
Required ratio = (0.70 x 140) : (250 + 30) = 98:280 = 7:20
A cross between two inbreds by reversing the orders of male and female parent is called?
ISO series 22000 related to
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