Self Maths Puzzle Numerical Ability

6 coins are tossed What is the probability of getting 3 heads and 3 tails (HHHTTT) ?

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Self Other Question

What will be the next sequence in this series?
10,24,130,336,1342,_____?
what is the next term in this series :
1,2,6,20,70,..... ?

options :
1)210
2)220
3)242
4)252
5)332
6)462
7)495
8)505
9)540
10)552