The word "total" in "total internal reflection" is used in the following sense: all of the light that could possibly propagate away from this surface is reflected, and none is refracted.
So, split the number 20 into its prime factors. Here, 5 is a prime number and 4 is a composite number, which can be factored further. Hence, the prime factorization of 20 is 2 × 2 × 5 or 22 × 5.
Sex Ratio in Bihar is 918 i.e. for each 1000 male, which is below national average of 940 as per census 2011. In 2001, the sex ratio of female was 921 per 1000 males in Bihar.
State Govt. of Bihar: Reserve Bank of India - India's Central Bank
ICT for Financial Inclusion: Financial Inclusion & Financial Literacy Cell
Sex Ratio in Bihar is 918 i.e. for each 1000 male, which is below national average of 940 as per census 2011. In 2001, the sex ratio of female was 921 per 1000 males in Bihar.
State Govt. of Bihar: Reserve Bank of India - India's Central Bank
ICT for Financial Inclusion: Financial Inclusion & Financial Literacy Cell