Question

${27}^{15}\times {27}^{3.5}={27}^{?}$

• A. 5
• B. 7
• C. 3
• D. 2
• E. None of these

Answer 1

The correct option is A 5

Here, ${27}^{1.5+3.5}={27}^{?}$
$\because m^x\times m^y=m^{x+y}$
$\Rightarrow {27}^5={21}^{?}$
$\Rightarrow ?=5$