Compound proportion - 2nd Type मिश्र समानुपात maths short trick

The 1st, 2nd and 4th terms of a proportion are 12, 21 and 14 respectively. Its third term is

When a pure strain of tall plants (T/T) with round peas (R/R) is crossed with a pure strain of short plants(t/t) with wrinkled peas (r/r), a F_(1) -generationis produced. The alleles for short and wrinkled are recessive to those for tall and round, respectively. When these F_(1) plants self-pollinate, what proportion of the F_(1) plants self -pollinate, what proportion of the F_(2) -generation is short with wrinkled peas?

In two types of stainless steel, the ratio of chromium and steel are 2 : 11 and 5 : 21 ,respectively. In what proportion should the two types be mixed, so thta the ratio of chromium to steel in the mixed type become 7 : 32 ?

In two types of stainless steel, the ratio of chromium and steel are 2 : 11 and 5 : 21 ,respectively. In what proportion should the two types be mixed, so thta the ratio of chromium to steel in the mixed type become 7 : 32 ?

How To Compare Fractional Numbers | Maths Short Tricks | SSC, IBPS, RAILWAYS, NTPC, SBI PO

Solve Any Calculus Problem in Just 20 Seconds | Maths Short Tricks For JEE Mains 2020

What is the formula of binary compound formed between : 2nd element of II group and 1st element of 17th group ?